Subtract 21/28 from 80/4
1st number: 20 0/4, 2nd number: 21/28
80/4 - 21/28 is 77/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 28 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
80/4 = 80 × 7/4 × 7 = 560/28 - Likewise, for the 2nd fraction, since 28 × 1 = 28,
21/28 = 21 × 1/28 × 1 = 21/28 - Subtract the two like fractions:
560/28 - 21/28 = 560 - 21/28 = 539/28 - After reducing the fraction, the answer is 77/4
- In mixed form: 191/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/4-42/28 80/8-21/28 80/4-21/56 80/4-63/28 80/12-21/28 80/4-21/84 80/20-21/28 80/28-21/28