Subtract 25/16 from 21/49
1st number: 21/49, 2nd number: 1 9/16
21/49 - 25/16 is -127/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 16 is 784
Next, find the equivalent fraction of both fractional numbers with denominator 784 - For the 1st fraction, since 49 × 16 = 784,
21/49 = 21 × 16/49 × 16 = 336/784 - Likewise, for the 2nd fraction, since 16 × 49 = 784,
25/16 = 25 × 49/16 × 49 = 1225/784 - Subtract the two like fractions:
336/784 - 1225/784 = 336 - 1225/784 = -889/784 - After reducing the fraction, the answer is -127/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49-25/16 21/49-50/16 21/98-25/16 21/49-25/32 63/49-25/16 21/49-75/16 21/49-25/48 21/49-25/80