Subtract 9/90 from 15/24
15/24 - 9/90 is 21/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 24 × 15 = 360,
15/24 = 15 × 15/24 × 15 = 225/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
9/90 = 9 × 4/90 × 4 = 36/360 - Subtract the two like fractions:
225/360 - 36/360 = 225 - 36/360 = 189/360 - After reducing the fraction, the answer is 21/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/24-9/90 15/24-18/90 15/48-9/90 45/24-9/90 15/24-27/90 15/72-9/90 75/24-9/90 15/24-45/90 15/24-63/90