Subtract 15/90 from 50/56
50/56 - 15/90 is 61/84.
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,
50/56 = 50 × 45/56 × 45 = 2250/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
15/90 = 15 × 28/90 × 28 = 420/2520 - Subtract the two like fractions:
2250/2520 - 420/2520 = 2250 - 420/2520 = 1830/2520 - After reducing the fraction, the answer is 61/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/56-30/90 50/56-45/90 50/56-75/90