Subtract 20/15 from 24/28
1st number: 24/28, 2nd number: 1 5/15
24/28 - 20/15 is -10/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
24/28 = 24 × 15/28 × 15 = 360/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
20/15 = 20 × 28/15 × 28 = 560/420 - Subtract the two like fractions:
360/420 - 560/420 = 360 - 560/420 = -200/420 - After reducing the fraction, the answer is -10/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/28-20/15 24/28-40/15 24/56-20/15 24/28-20/30 72/28-20/15 24/28-60/15 24/84-20/15 24/28-20/45 24/28-20/75