Subtract 90/60 from 64/84
1st number: 64/84, 2nd number: 1 30/60
64/84 - 90/60 is -31/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
64/84 = 64 × 5/84 × 5 = 320/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
90/60 = 90 × 7/60 × 7 = 630/420 - Subtract the two like fractions:
320/420 - 630/420 = 320 - 630/420 = -310/420 - After reducing the fraction, the answer is -31/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: