Subtract 24/21 from 45/28
1st number: 1 17/28, 2nd number: 1 3/21
45/28 - 24/21 is 13/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
45/28 = 45 × 3/28 × 3 = 135/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
24/21 = 24 × 4/21 × 4 = 96/84 - Subtract the two like fractions:
135/84 - 96/84 = 135 - 96/84 = 39/84 - After reducing the fraction, the answer is 13/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/28-24/21 45/28-48/21 45/56-24/21 45/28-24/42 45/28-72/21 45/84-24/21 45/28-24/63