Solve Complex Fraction Expression: (10/7)/2 + 2/(7/8)

Question

1072+278= \frac{\frac{10}{7}}{2}+\frac{2}{\frac{7}{8}}=

Video Solution

Step-by-Step Solution

To solve the expression 1072+278 \frac{\frac{10}{7}}{2}+\frac{2}{\frac{7}{8}} , we need to perform operations in the correct order as per the rules of the order of operations (PEMDAS/BODMAS - Parentheses/Brackets, Exponents/Orders, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).

Step 1: Simplify the complex fraction 1072 \frac{\frac{10}{7}}{2}
A complex fraction can be simplified by multiplying the numerator by the reciprocal of the denominator. In this case, the numerator is 107 \frac{10}{7} and the denominator is 2 (which means 21 \frac{2}{1} ).


1072=107×12=10172=1014 \frac{\frac{10}{7}}{2} = \frac{10}{7} \times \frac{1}{2} = \frac{10 \cdot 1}{7 \cdot 2} = \frac{10}{14}


Simplify 1014 \frac{10}{14} by dividing both the numerator and the denominator by their greatest common divisor (2):


1014=57 \frac{10}{14} = \frac{5}{7}

Step 2: Simplify the complex fraction 278 \frac{2}{\frac{7}{8}}
Again, multiply the numerator by the reciprocal of the denominator:
The reciprocal of 78 \frac{7}{8} is 87 \frac{8}{7} .


278=2×87=287=167 \frac{2}{\frac{7}{8}} = 2 \times \frac{8}{7} = \frac{2 \cdot 8}{7} = \frac{16}{7}

Step 3: Add the simplified fractions 57+167 \frac{5}{7} + \frac{16}{7}
Since the fractions have like denominators, we can add the numerators directly:


57+167=5+167=217 \frac{5}{7} + \frac{16}{7} = \frac{5 + 16}{7} = \frac{21}{7}


Simplify 217 \frac{21}{7} by dividing the numerator by the denominator:


217=3 \frac{21}{7} = 3

Thus, the solution to the expression is 3 3 .

Answer

3 3