Subtract 15/90 from 30/56
30/56 - 15/90 is 31/84.
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,
30/56 = 30 × 45/56 × 45 = 1350/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
15/90 = 15 × 28/90 × 28 = 420/2520 - Subtract the two like fractions:
1350/2520 - 420/2520 = 1350 - 420/2520 = 930/2520 - After reducing the fraction, the answer is 31/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/56-15/90 30/56-30/90 90/56-15/90 30/56-45/90 30/56-75/90