Subtract 90/27 from 42/5
1st number: 8 2/5, 2nd number: 3 9/27
42/5 - 90/27 is 76/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 5 × 27 = 135,
42/5 = 42 × 27/5 × 27 = 1134/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
90/27 = 90 × 5/27 × 5 = 450/135 - Subtract the two like fractions:
1134/135 - 450/135 = 1134 - 450/135 = 684/135 - After reducing the fraction, the answer is 76/15
- In mixed form: 51/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/5-90/27 42/10-90/27 42/5-90/54 42/15-90/27 42/5-90/81 42/25-90/27 42/35-90/27