Subtract 24/28 from 7/90
7/90 - 24/28 is -491/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 28 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 90 × 14 = 1260,
7/90 = 7 × 14/90 × 14 = 98/1260 - Likewise, for the 2nd fraction, since 28 × 45 = 1260,
24/28 = 24 × 45/28 × 45 = 1080/1260 - Subtract the two like fractions:
98/1260 - 1080/1260 = 98 - 1080/1260 = -982/1260 - After reducing the fraction, the answer is -491/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90-24/28 7/90-48/28 7/90-24/56 21/90-24/28 7/90-72/28 7/90-24/84 35/90-24/28 49/90-24/28