Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 30/12 from 90/45

1st number: 2 0/45, 2nd number: 2 6/12

90/45 - 30/12 is -1/2.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 12 is 180
  2. For the 1st fraction, since 45 × 4 = 180,
    90/45 = 90 × 4/45 × 4 = 360/180
  3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
    30/12 = 30 × 15/12 × 15 = 450/180
  4. Subtract the two fractions:
    360/180 - 450/180 = 360 - 450/180 = -90/180
  5. After reducing the fraction, the answer is -1/2

MathStep (Works offline)

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

Related:

© everydaycalculation.com