Subtract 63/7 from 90/60
1st number: 1 30/60, 2nd number: 9 0/7
90/60 - 63/7 is -15/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 7 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
90/60 = 90 × 7/60 × 7 = 630/420 - Likewise, for the 2nd fraction, since 7 × 60 = 420,
63/7 = 63 × 60/7 × 60 = 3780/420 - Subtract the two like fractions:
630/420 - 3780/420 = 630 - 3780/420 = -3150/420 - After reducing the fraction, the answer is -15/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/60-63/14 90/60-63/21 90/60-63/35 90/60-63/49