Subtract 7/12 from 90/42
1st number: 2 6/42, 2nd number: 7/12
90/42 - 7/12 is 131/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
90/42 = 90 × 2/42 × 2 = 180/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
7/12 = 7 × 7/12 × 7 = 49/84 - Subtract the two like fractions:
180/84 - 49/84 = 180 - 49/84 = 131/84 - In mixed form: 147/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42-14/12 90/84-7/12 90/42-7/24 90/42-21/12 90/42-7/36 90/42-35/12 90/42-7/60 90/42-49/12 90/42-7/84