Subtract 90/7 from 45/5
1st number: 9 0/5, 2nd number: 12 6/7
45/5 - 90/7 is -27/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 5 × 7 = 35,
45/5 = 45 × 7/5 × 7 = 315/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
90/7 = 90 × 5/7 × 5 = 450/35 - Subtract the two like fractions:
315/35 - 450/35 = 315 - 450/35 = -135/35 - After reducing the fraction, the answer is -27/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/5-90/7 45/10-90/7 45/5-90/14 45/15-90/7 45/5-90/21 45/25-90/7 45/5-90/35 45/35-90/7 45/5-90/49