Subtract 10/42 from 90/54
1st number: 1 36/54, 2nd number: 10/42
90/54 - 10/42 is 10/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
90/54 = 90 × 7/54 × 7 = 630/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
10/42 = 10 × 9/42 × 9 = 90/378 - Subtract the two like fractions:
630/378 - 90/378 = 630 - 90/378 = 540/378 - After reducing the fraction, the answer is 10/7
- In mixed form: 13/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/54-20/42 90/54-10/84 90/54-30/42 90/54-50/42 90/54-70/42