Subtract 81/70 from 60/84
1st number: 60/84, 2nd number: 1 11/70
60/84 - 81/70 is -31/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
60/84 = 60 × 5/84 × 5 = 300/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
81/70 = 81 × 6/70 × 6 = 486/420 - Subtract the two like fractions:
300/420 - 486/420 = 300 - 486/420 = -186/420 - After reducing the fraction, the answer is -31/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: