Subtract 15/35 from 90/20
1st number: 4 10/20, 2nd number: 15/35
90/20 - 15/35 is 57/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 35 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
90/20 = 90 × 7/20 × 7 = 630/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
15/35 = 15 × 4/35 × 4 = 60/140 - Subtract the two like fractions:
630/140 - 60/140 = 630 - 60/140 = 570/140 - After reducing the fraction, the answer is 57/14
- In mixed form: 41/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-30/35 90/40-15/35 90/20-15/70 90/20-45/35 90/60-15/35 90/20-75/35