Subtract 40/28 from 72/4
1st number: 18 0/4, 2nd number: 1 12/28
72/4 - 40/28 is 116/7.
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,
72/4 = 72 × 7/4 × 7 = 504/28 - Likewise, for the 2nd fraction, since 28 × 1 = 28,
40/28 = 40 × 1/28 × 1 = 40/28 - Subtract the two like fractions:
504/28 - 40/28 = 504 - 40/28 = 464/28 - After reducing the fraction, the answer is 116/7
- In mixed form: 164/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/4-80/28 72/8-40/28 72/4-40/56 72/12-40/28 72/4-40/84 72/20-40/28 72/28-40/28