Solve Fraction Subtraction: 2/4 - 1/6 Step-by-Step

Fraction Subtraction with Different Denominators

Solve the following exercise:

2416=? \frac{2}{4}-\frac{1}{6}=\text{?}

❤️ Continue Your Math Journey!

We have hundreds of course questions with personalized recommendations + Account 100% premium

Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:07 Let's solve this problem together!
00:10 We need to find the least common denominator to begin.
00:14 To do this, Multiply both numbers by 3 and 2. This gives us a common denominator.
00:20 Remember, multiply the top number and the bottom number, the numerator and denominator, by the same values.
00:28 Now, it's time to do the calculations.
00:34 Once that's done, subtract using the common denominator you found.
00:41 Let's focus on finding the new numerator.
00:46 Great work! Now reduce the fraction as much as you can.
00:51 Be sure to divide both the top and bottom by the same number.
00:56 And there you have it, the solution to our question!

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve the following exercise:

2416=? \frac{2}{4}-\frac{1}{6}=\text{?}

2

Step-by-step solution

To solve this problem, we will follow these steps:

  • Step 1: Simplify the initial fraction 24\frac{2}{4}.
  • Step 2: Find a common denominator for 12\frac{1}{2} and 16\frac{1}{6}.
  • Step 3: Convert the fractions to have the common denominator.
  • Step 4: Subtract the fractions.
  • Step 5: Simplify the resulting fraction.

Let's work through these steps:

Step 1: Simplify 24=12\frac{2}{4} = \frac{1}{2}.

Step 2: Identify the least common denominator (LCD) for 12\frac{1}{2} and 16\frac{1}{6}. The denominators are 2 and 6, and the LCM of 2 and 6 is 6.

Step 3: Convert both fractions to have this common denominator.
12=1×32×3=36\frac{1}{2} = \frac{1 \times 3}{2 \times 3} = \frac{3}{6}
16=16\frac{1}{6} = \frac{1}{6} (already with the correct denominator).

Step 4: Subtract the fractions:
3616=316=26\frac{3}{6} - \frac{1}{6} = \frac{3 - 1}{6} = \frac{2}{6}.

Step 5: Simplify the resulting fraction 26\frac{2}{6}. Find the greatest common divisor (GCD) of 2 and 6, which is 2, and divide both numerator and denominator by 2:
26=2÷26÷2=13\frac{2}{6} = \frac{2 \div 2}{6 \div 2} = \frac{1}{3}.

Therefore, the solution to the problem is 13\frac{1}{3}.

3

Final Answer

13 \frac{1}{3}

Key Points to Remember

Essential concepts to master this topic
  • Rule: Find common denominator before subtracting fractions with different denominators
  • Technique: Convert 12 \frac{1}{2} to 36 \frac{3}{6} using LCD of 6
  • Check: Verify 13+16=26+16=36=12 \frac{1}{3} + \frac{1}{6} = \frac{2}{6} + \frac{1}{6} = \frac{3}{6} = \frac{1}{2}

Common Mistakes

Avoid these frequent errors
  • Subtracting numerators and denominators separately
    Don't subtract 2416 \frac{2}{4} - \frac{1}{6} as 2146=12 \frac{2-1}{4-6} = \frac{1}{-2} ! This ignores fraction rules and gives meaningless results. Always find a common denominator first, then subtract only the numerators.

Practice Quiz

Test your knowledge with interactive questions

Solve the following exercise:

\( \frac{3}{2}-\frac{1}{2}=\text{?} \)

FAQ

Everything you need to know about this question

Why can't I just subtract 2-1=1 and 4-6=-2?

+

Because fractions represent parts of a whole, not separate numbers! 24 \frac{2}{4} means 2 parts out of 4, while 16 \frac{1}{6} means 1 part out of 6. You need same-sized parts to subtract them.

How do I find the least common denominator?

+

List the multiples of each denominator until you find the smallest number that appears in both lists. For 4 and 6: multiples of 4 are 4, 8, 12... and multiples of 6 are 6, 12... so LCD = 12. But here we simplified first!

Should I always simplify fractions before solving?

+

Yes, when possible! Simplifying 24=12 \frac{2}{4} = \frac{1}{2} first made this problem easier because the LCD of 2 and 6 is just 6, not 12.

What if my final answer needs to be simplified?

+

Always check if your answer can be simplified! Find the Greatest Common Factor (GCF) of the numerator and denominator, then divide both by it. Here, 26=13 \frac{2}{6} = \frac{1}{3} because GCF(2,6) = 2.

Can I use 12 as the common denominator instead of 6?

+

Absolutely! Using LCD = 12 gives: 612212=412=13 \frac{6}{12} - \frac{2}{12} = \frac{4}{12} = \frac{1}{3} . You'll get the same answer, but using the least common denominator keeps numbers smaller and easier to work with.

🌟 Unlock Your Math Potential

Get unlimited access to all 18 Operations with Fractions questions, detailed video solutions, and personalized progress tracking.

📹

Unlimited Video Solutions

Step-by-step explanations for every problem

📊

Progress Analytics

Track your mastery across all topics

🚫

Ad-Free Learning

Focus on math without distractions

No credit card required • Cancel anytime

More Questions

Click on any question to see the complete solution with step-by-step explanations