Subtract 4/28 from 15/90
15/90 - 4/28 is 1/42.
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,
15/90 = 15 × 14/90 × 14 = 210/1260 - Likewise, for the 2nd fraction, since 28 × 45 = 1260,
4/28 = 4 × 45/28 × 45 = 180/1260 - Subtract the two like fractions:
210/1260 - 180/1260 = 210 - 180/1260 = 30/1260 - After reducing the fraction, the answer is 1/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90-4/28 15/90-8/28 15/90-4/56 45/90-4/28 15/90-12/28 15/90-4/84 75/90-4/28 15/90-20/28