Subtract 24/72 from 15/90
15/90 - 24/72 is -1/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
15/90 = 15 × 4/90 × 4 = 60/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
24/72 = 24 × 5/72 × 5 = 120/360 - Subtract the two like fractions:
60/360 - 120/360 = 60 - 120/360 = -60/360 - After reducing the fraction, the answer is -1/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90-24/72 15/90-48/72 45/90-24/72 75/90-24/72