Subtract 45/72 from 25/90
25/90 - 45/72 is -25/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
25/90 = 25 × 4/90 × 4 = 100/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
45/72 = 45 × 5/72 × 5 = 225/360 - Subtract the two like fractions:
100/360 - 225/360 = 100 - 225/360 = -125/360 - After reducing the fraction, the answer is -25/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/90-45/72 25/90-90/72 75/90-45/72