Subtract 60/90 from 7/28
7/28 - 60/90 is -5/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
7/28 = 7 × 45/28 × 45 = 315/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
60/90 = 60 × 14/90 × 14 = 840/1260 - Subtract the two like fractions:
315/1260 - 840/1260 = 315 - 840/1260 = -525/1260 - After reducing the fraction, the answer is -5/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28-60/90 7/56-60/90 21/28-60/90 7/84-60/90 35/28-60/90 49/28-60/90