Subtract 90/15 from 27/40
1st number: 27/40, 2nd number: 6 0/15
27/40 - 90/15 is -213/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
27/40 = 27 × 3/40 × 3 = 81/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
90/15 = 90 × 8/15 × 8 = 720/120 - Subtract the two like fractions:
81/120 - 720/120 = 81 - 720/120 = -639/120 - After reducing the fraction, the answer is -213/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/40-90/15 27/80-90/15 27/40-90/30 81/40-90/15 27/40-90/45 27/40-90/75