Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 63/70 from 54/80

54/80 - 63/70 is -9/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 70 is 560
  2. For the 1st fraction, since 80 × 7 = 560,
    54/80 = 54 × 7/80 × 7 = 378/560
  3. Likewise, for the 2nd fraction, since 70 × 8 = 560,
    63/70 = 63 × 8/70 × 8 = 504/560
  4. Subtract the two fractions:
    378/560 - 504/560 = 378 - 504/560 = -126/560
  5. After reducing the fraction, the answer is -9/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com