Subtract 16/90 from 7/28
7/28 - 16/90 is 13/180.
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,
16/90 = 16 × 14/90 × 14 = 224/1260 - Subtract the two like fractions:
315/1260 - 224/1260 = 315 - 224/1260 = 91/1260 - After reducing the fraction, the answer is 13/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28-16/90 7/28-32/90 7/56-16/90 21/28-16/90 7/28-48/90 7/84-16/90 35/28-16/90 7/28-80/90 49/28-16/90