Subtract 21/40 from 49/28
1st number: 1 21/28, 2nd number: 21/40
49/28 - 21/40 is 49/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
49/28 = 49 × 10/28 × 10 = 490/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
21/40 = 21 × 7/40 × 7 = 147/280 - Subtract the two like fractions:
490/280 - 147/280 = 490 - 147/280 = 343/280 - After reducing the fraction, the answer is 49/40
- In mixed form: 19/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/28-21/40 49/28-42/40 49/56-21/40 49/28-21/80 49/28-63/40 49/84-21/40