Subtract 7/56 from 9/90
9/90 - 7/56 is -1/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 90 × 28 = 2520,
9/90 = 9 × 28/90 × 28 = 252/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
7/56 = 7 × 45/56 × 45 = 315/2520 - Subtract the two like fractions:
252/2520 - 315/2520 = 252 - 315/2520 = -63/2520 - After reducing the fraction, the answer is -1/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/90-7/56 9/90-14/56 27/90-7/56 9/90-21/56 45/90-7/56 9/90-35/56 63/90-7/56 9/90-49/56