Subtract 28/72 from 3/25
3/25 - 28/72 is -121/450.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 72 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 25 × 72 = 1800,
3/25 = 3 × 72/25 × 72 = 216/1800 - Likewise, for the 2nd fraction, since 72 × 25 = 1800,
28/72 = 28 × 25/72 × 25 = 700/1800 - Subtract the two like fractions:
216/1800 - 700/1800 = 216 - 700/1800 = -484/1800 - After reducing the fraction, the answer is -121/450
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/25-28/72 3/25-56/72 3/50-28/72 9/25-28/72 3/25-84/72 3/75-28/72 15/25-28/72 21/25-28/72