Subtract 70/60 from 21/49
1st number: 21/49, 2nd number: 1 10/60
21/49 - 70/60 is -31/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 60 is 2940
Next, find the equivalent fraction of both fractional numbers with denominator 2940 - For the 1st fraction, since 49 × 60 = 2940,
21/49 = 21 × 60/49 × 60 = 1260/2940 - Likewise, for the 2nd fraction, since 60 × 49 = 2940,
70/60 = 70 × 49/60 × 49 = 3430/2940 - Subtract the two like fractions:
1260/2940 - 3430/2940 = 1260 - 3430/2940 = -2170/2940 - 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: 42/49-70/60 21/98-70/60 63/49-70/60