Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 21/7 from 45/12

1st number: 3 9/12, 2nd number: 3 0/7

45/12 - 21/7 is 3/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 7 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 12 × 7 = 84,
    45/12 = 45 × 7/12 × 7 = 315/84
  3. Likewise, for the 2nd fraction, since 7 × 12 = 84,
    21/7 = 21 × 12/7 × 12 = 252/84
  4. Subtract the two like fractions:
    315/84 - 252/84 = 315 - 252/84 = 63/84
  5. After reducing the fraction, the answer is 3/4

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related:

© everydaycalculation.com