Subtract 15/42 from 35/20
1st number: 1 15/20, 2nd number: 15/42
35/20 - 15/42 is 39/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 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 42 × 10 = 420,
15/42 = 15 × 10/42 × 10 = 150/420 - Subtract the two like fractions:
735/420 - 150/420 = 735 - 150/420 = 585/420 - After reducing the fraction, the answer is 39/28
- In mixed form: 111/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20-15/42 35/20-30/42 35/40-15/42 35/20-15/84 35/20-45/42 35/60-15/42 35/20-75/42