Subtract 81/7 from 90/4
1st number: 22 2/4, 2nd number: 11 4/7
90/4 - 81/7 is 153/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
90/4 = 90 × 7/4 × 7 = 630/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
81/7 = 81 × 4/7 × 4 = 324/28 - Subtract the two like fractions:
630/28 - 324/28 = 630 - 324/28 = 306/28 - After reducing the fraction, the answer is 153/14
- In mixed form: 1013/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/8-81/7 90/4-81/14 90/12-81/7 90/4-81/21 90/20-81/7 90/4-81/35 90/28-81/7 90/4-81/49