Subtract 49/48 from 20/90
1st number: 20/90, 2nd number: 1 1/48
20/90 - 49/48 is -115/144.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 48 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
20/90 = 20 × 8/90 × 8 = 160/720 - Likewise, for the 2nd fraction, since 48 × 15 = 720,
49/48 = 49 × 15/48 × 15 = 735/720 - Subtract the two like fractions:
160/720 - 735/720 = 160 - 735/720 = -575/720 - After reducing the fraction, the answer is -115/144
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90-49/48 20/90-98/48 20/90-49/96 60/90-49/48