Subtract 90/42 from 30/5
1st number: 6 0/5, 2nd number: 2 6/42
30/5 - 90/42 is 27/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
30/5 = 30 × 42/5 × 42 = 1260/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
90/42 = 90 × 5/42 × 5 = 450/210 - Subtract the two like fractions:
1260/210 - 450/210 = 1260 - 450/210 = 810/210 - After reducing the fraction, the answer is 27/7
- In mixed form: 36/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/5-90/42 30/10-90/42 30/5-90/84 90/5-90/42 30/15-90/42 30/25-90/42 30/35-90/42