Subtract 45/28 from 36/90
1st number: 36/90, 2nd number: 1 17/28
36/90 - 45/28 is -169/140.
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,
36/90 = 36 × 14/90 × 14 = 504/1260 - Likewise, for the 2nd fraction, since 28 × 45 = 1260,
45/28 = 45 × 45/28 × 45 = 2025/1260 - Subtract the two like fractions:
504/1260 - 2025/1260 = 504 - 2025/1260 = -1521/1260 - After reducing the fraction, the answer is -169/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/90-45/28 36/90-90/28 36/90-45/56 36/90-45/84