Subtract 50/90 from 15/56
15/56 - 50/90 is -145/504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 90 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
15/56 = 15 × 45/56 × 45 = 675/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
50/90 = 50 × 28/90 × 28 = 1400/2520 - Subtract the two like fractions:
675/2520 - 1400/2520 = 675 - 1400/2520 = -725/2520 - After reducing the fraction, the answer is -145/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/56-50/90 45/56-50/90 75/56-50/90