Subtract 63/56 from 72/90
1st number: 72/90, 2nd number: 1 7/56
72/90 - 63/56 is -13/40.
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,
72/90 = 72 × 28/90 × 28 = 2016/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
63/56 = 63 × 45/56 × 45 = 2835/2520 - Subtract the two like fractions:
2016/2520 - 2835/2520 = 2016 - 2835/2520 = -819/2520 - After reducing the fraction, the answer is -13/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: