153:21=
To solve the problem of dividing the mixed number 153 by the fraction 21, follow these steps:
- Step 1: Convert the mixed number to an improper fraction.
- Step 2: Take the reciprocal of the divisor fraction.
- Step 3: Multiply the improper fraction by the reciprocal.
- Step 4: Simplify the resulting fraction if necessary.
Now, let's execute each step:
Step 1: Convert 153 to an improper fraction. To do this, multiply the whole number 1 by the denominator 5 and add the numerator 3:
1×5+3=5+3=8
This gives us 58.
Step 2: Take the reciprocal of 21, which is 12.
Step 3: Multiply 58 by 12:
58×12=5×18×2=516
Step 4: Simplify 516 by converting it back to a mixed number:
Divide 16 by 5, which results in 3 with a remainder of 1, giving us 351.
Therefore, the result of 153÷21 is 351.