Subtract 8/21 from 35/20
1st number: 1 15/20, 2nd number: 8/21
35/20 - 8/21 is 115/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
35/20 = 35 × 21/20 × 21 = 735/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
8/21 = 8 × 20/21 × 20 = 160/420 - Subtract the two like fractions:
735/420 - 160/420 = 735 - 160/420 = 575/420 - After reducing the fraction, the answer is 115/84
- In mixed form: 131/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20-8/21 35/20-16/21 35/40-8/21 35/20-8/42 35/20-24/21 35/60-8/21 35/20-8/63 35/20-40/21 35/20-56/21