Subtract 15/9 from 45/72
1st number: 45/72, 2nd number: 1 6/9
45/72 - 15/9 is -25/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
45/72 = 45 × 1/72 × 1 = 45/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
15/9 = 15 × 8/9 × 8 = 120/72 - Subtract the two like fractions:
45/72 - 120/72 = 45 - 120/72 = -75/72 - After reducing the fraction, the answer is -25/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72-15/9 45/72-30/9 45/72-15/18 45/72-45/9 45/72-15/27 45/72-75/9 45/72-15/45 45/72-15/63