Subtract 90/7 from 40/2
1st number: 20 0/2, 2nd number: 12 6/7
40/2 - 90/7 is 50/7.
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,
40/2 = 40 × 7/2 × 7 = 280/14 - Likewise, for the 2nd fraction, since 7 × 2 = 14,
90/7 = 90 × 2/7 × 2 = 180/14 - Subtract the two like fractions:
280/14 - 180/14 = 280 - 180/14 = 100/14 - After reducing the fraction, the answer is 50/7
- In mixed form: 71/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/2-90/7 40/4-90/7 40/2-90/14 40/6-90/7 40/2-90/21 40/10-90/7 40/2-90/35 40/14-90/7 40/2-90/49