Subtract 49/56 from 75/90
75/90 - 49/56 is -1/24.
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,
75/90 = 75 × 28/90 × 28 = 2100/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
49/56 = 49 × 45/56 × 45 = 2205/2520 - Subtract the two like fractions:
2100/2520 - 2205/2520 = 2100 - 2205/2520 = -105/2520 - After reducing the fraction, the answer is -1/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/90-98/56