Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 7/84 from 42/40

1st number: 1 2/40, 2nd number: 7/84

42/40 - 7/84 is 29/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 84 is 840
  2. For the 1st fraction, since 40 × 21 = 840,
    42/40 = 42 × 21/40 × 21 = 882/840
  3. Likewise, for the 2nd fraction, since 84 × 10 = 840,
    7/84 = 7 × 10/84 × 10 = 70/840
  4. Subtract the two fractions:
    882/840 - 70/840 = 882 - 70/840 = 812/840
  5. After reducing the fraction, the answer is 29/30

MathStep (Works offline)

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

Related:

© everydaycalculation.com