Subtract 20/72 from 25/75
25/75 - 20/72 is 1/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 72 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 75 × 24 = 1800,
25/75 = 25 × 24/75 × 24 = 600/1800 - Likewise, for the 2nd fraction, since 72 × 25 = 1800,
20/72 = 20 × 25/72 × 25 = 500/1800 - Subtract the two like fractions:
600/1800 - 500/1800 = 600 - 500/1800 = 100/1800 - After reducing the fraction, the answer is 1/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/75-20/72 25/75-40/72 25/75-60/72