Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 60/21 from 15/40

1st number: 15/40, 2nd number: 2 18/21

15/40 - 60/21 is -139/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 21 is 840
  2. For the 1st fraction, since 40 × 21 = 840,
    15/40 = 15 × 21/40 × 21 = 315/840
  3. Likewise, for the 2nd fraction, since 21 × 40 = 840,
    60/21 = 60 × 40/21 × 40 = 2400/840
  4. Subtract the two fractions:
    315/840 - 2400/840 = 315 - 2400/840 = -2085/840
  5. After reducing the fraction, the answer is -139/56

MathStep (Works offline)

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

Related:

© everydaycalculation.com