Subtract 90/18 from 48/42
1st number: 1 6/42, 2nd number: 5 0/18
48/42 - 90/18 is -27/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
48/42 = 48 × 3/42 × 3 = 144/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
90/18 = 90 × 7/18 × 7 = 630/126 - Subtract the two like fractions:
144/126 - 630/126 = 144 - 630/126 = -486/126 - After reducing the fraction, the answer is -27/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 96/42-90/18 48/84-90/18 48/42-90/36 48/42-90/54