Subtract 81/72 from 4/25
1st number: 4/25, 2nd number: 1 9/72
4/25 - 81/72 is -193/200.
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,
4/25 = 4 × 72/25 × 72 = 288/1800 - Likewise, for the 2nd fraction, since 72 × 25 = 1800,
81/72 = 81 × 25/72 × 25 = 2025/1800 - Subtract the two like fractions:
288/1800 - 2025/1800 = 288 - 2025/1800 = -1737/1800 - After reducing the fraction, the answer is -193/200
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/25-81/72 4/50-81/72 12/25-81/72 4/75-81/72 20/25-81/72 28/25-81/72