Subtract 49/40 from 21/6
1st number: 3 3/6, 2nd number: 1 9/40
21/6 - 49/40 is 91/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 6 × 20 = 120,
21/6 = 21 × 20/6 × 20 = 420/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
49/40 = 49 × 3/40 × 3 = 147/120 - Subtract the two like fractions:
420/120 - 147/120 = 420 - 147/120 = 273/120 - After reducing the fraction, the answer is 91/40
- In mixed form: 211/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6-49/40 21/6-98/40 21/12-49/40 21/6-49/80 63/6-49/40 21/18-49/40 21/30-49/40 21/42-49/40