Subtract 30/7 from 90/5
1st number: 18 0/5, 2nd number: 4 2/7
90/5 - 30/7 is 96/7.
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,
90/5 = 90 × 7/5 × 7 = 630/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
30/7 = 30 × 5/7 × 5 = 150/35 - Subtract the two like fractions:
630/35 - 150/35 = 630 - 150/35 = 480/35 - After reducing the fraction, the answer is 96/7
- In mixed form: 135/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/5-60/7 90/10-30/7 90/5-30/14 90/5-90/7 90/15-30/7 90/5-30/21 90/25-30/7 90/5-30/35 90/35-30/7 90/5-30/49