Subtract 40/7 from 90/2
1st number: 45 0/2, 2nd number: 5 5/7
90/2 - 40/7 is 275/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 7 is 14
Next, find the equivalent fraction of both fractional numbers with denominator 14 - For the 1st fraction, since 2 × 7 = 14,
90/2 = 90 × 7/2 × 7 = 630/14 - Likewise, for the 2nd fraction, since 7 × 2 = 14,
40/7 = 40 × 2/7 × 2 = 80/14 - Subtract the two like fractions:
630/14 - 80/14 = 630 - 80/14 = 550/14 - After reducing the fraction, the answer is 275/7
- In mixed form: 392/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/2-80/7 90/4-40/7 90/2-40/14 90/6-40/7 90/2-40/21 90/10-40/7 90/2-40/35 90/14-40/7 90/2-40/49