Subtract 27/7 from 90/42
1st number: 2 6/42, 2nd number: 3 6/7
90/42 - 27/7 is -12/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
90/42 = 90 × 1/42 × 1 = 90/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
27/7 = 27 × 6/7 × 6 = 162/42 - Subtract the two like fractions:
90/42 - 162/42 = 90 - 162/42 = -72/42 - After reducing the fraction, the answer is -12/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42-54/7 90/84-27/7 90/42-27/14 90/42-81/7 90/42-27/21 90/42-27/35 90/42-27/49