Subtract 28/80 from 24/21
1st number: 1 3/21, 2nd number: 28/80
24/21 - 28/80 is 111/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
24/21 = 24 × 80/21 × 80 = 1920/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
28/80 = 28 × 21/80 × 21 = 588/1680 - Subtract the two like fractions:
1920/1680 - 588/1680 = 1920 - 588/1680 = 1332/1680 - After reducing the fraction, the answer is 111/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/21-28/80 24/21-56/80 24/42-28/80 72/21-28/80 24/21-84/80 24/63-28/80