Subtract 27/63 from 90/42
1st number: 2 6/42, 2nd number: 27/63
90/42 - 27/63 is 12/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
90/42 = 90 × 3/42 × 3 = 270/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
27/63 = 27 × 2/63 × 2 = 54/126 - Subtract the two like fractions:
270/126 - 54/126 = 270 - 54/126 = 216/126 - After reducing the fraction, the answer is 12/7
- In mixed form: 15/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42-54/63 90/84-27/63 90/42-81/63