Subtract 21/90 from 56/49
1st number: 1 7/49, 2nd number: 21/90
56/49 - 21/90 is 191/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 90 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 49 × 90 = 4410,
56/49 = 56 × 90/49 × 90 = 5040/4410 - Likewise, for the 2nd fraction, since 90 × 49 = 4410,
21/90 = 21 × 49/90 × 49 = 1029/4410 - Subtract the two like fractions:
5040/4410 - 1029/4410 = 5040 - 1029/4410 = 4011/4410 - After reducing the fraction, the answer is 191/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/49-42/90 56/98-21/90 56/49-63/90