Subtract 72/5 from 90/4
1st number: 22 2/4, 2nd number: 14 2/5
90/4 - 72/5 is 81/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
90/4 = 90 × 5/4 × 5 = 450/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
72/5 = 72 × 4/5 × 4 = 288/20 - Subtract the two like fractions:
450/20 - 288/20 = 450 - 288/20 = 162/20 - After reducing the fraction, the answer is 81/10
- In mixed form: 81/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/8-72/5 90/4-72/10 90/12-72/5 90/4-72/15 90/20-72/5 90/4-72/25 90/28-72/5 90/4-72/35