Subtract 72/30 from 15/10
1st number: 1 5/10, 2nd number: 2 12/30
15/10 - 72/30 is -9/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 10 × 3 = 30,
15/10 = 15 × 3/10 × 3 = 45/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
72/30 = 72 × 1/30 × 1 = 72/30 - Subtract the two like fractions:
45/30 - 72/30 = 45 - 72/30 = -27/30 - After reducing the fraction, the answer is -9/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/10-72/30 15/20-72/30 15/10-72/60 45/10-72/30 15/30-72/30 15/10-72/90 75/10-72/30 15/50-72/30 15/70-72/30