Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 98/80 from 30/70

1st number: 30/70, 2nd number: 1 18/80

30/70 - 98/80 is -223/280.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 80 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 70 × 8 = 560,
    30/70 = 30 × 8/70 × 8 = 240/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    98/80 = 98 × 7/80 × 7 = 686/560
  4. Subtract the two like fractions:
    240/560 - 686/560 = 240 - 686/560 = -446/560
  5. After reducing the fraction, the answer is -223/280

MathStep (Works offline)

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

Related:

© everydaycalculation.com