Subtract 72/15 from 45/10
1st number: 4 5/10, 2nd number: 4 12/15
45/10 - 72/15 is -3/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 10 × 3 = 30,
45/10 = 45 × 3/10 × 3 = 135/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
72/15 = 72 × 2/15 × 2 = 144/30 - Subtract the two like fractions:
135/30 - 144/30 = 135 - 144/30 = -9/30 - After reducing the fraction, the answer is -3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/10-72/15 45/20-72/15 45/10-72/30 45/30-72/15 45/10-72/45 45/50-72/15 45/10-72/75 45/70-72/15