Subtract 21/80 from 35/20
1st number: 1 15/20, 2nd number: 21/80
35/20 - 21/80 is 119/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
35/20 = 35 × 4/20 × 4 = 140/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Subtract the two like fractions:
140/80 - 21/80 = 140 - 21/80 = 119/80 - In mixed form: 139/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20-21/80 35/20-42/80 35/40-21/80 35/20-63/80 35/60-21/80