Subtract 21/80 from 35/15
1st number: 2 5/15, 2nd number: 21/80
35/15 - 21/80 is 497/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
35/15 = 35 × 16/15 × 16 = 560/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
21/80 = 21 × 3/80 × 3 = 63/240 - Subtract the two like fractions:
560/240 - 63/240 = 560 - 63/240 = 497/240 - In mixed form: 217/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/15-21/80 35/15-42/80 35/30-21/80 35/15-63/80 35/45-21/80 35/75-21/80