Subtract 72/15 from 10/20
1st number: 10/20, 2nd number: 4 12/15
10/20 - 72/15 is -43/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
10/20 = 10 × 3/20 × 3 = 30/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
72/15 = 72 × 4/15 × 4 = 288/60 - Subtract the two like fractions:
30/60 - 288/60 = 30 - 288/60 = -258/60 - After reducing the fraction, the answer is -43/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/40-72/15 10/20-72/30 30/20-72/15 10/60-72/15 10/20-72/45 50/20-72/15 10/20-72/75 70/20-72/15