Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 30/84 from 21/10

1st number: 2 1/10, 2nd number: 30/84

21/10 - 30/84 is 61/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 84 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 10 × 42 = 420,
    21/10 = 21 × 42/10 × 42 = 882/420
  3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
    30/84 = 30 × 5/84 × 5 = 150/420
  4. Subtract the two like fractions:
    882/420 - 150/420 = 882 - 150/420 = 732/420
  5. After reducing the fraction, the answer is 61/35
  6. In mixed form: 126/35

MathStep (Works offline)

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

Related:

© everydaycalculation.com