Subtract 90/72 from 8/25
1st number: 8/25, 2nd number: 1 18/72
8/25 - 90/72 is -93/100.
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,
8/25 = 8 × 72/25 × 72 = 576/1800 - Likewise, for the 2nd fraction, since 72 × 25 = 1800,
90/72 = 90 × 25/72 × 25 = 2250/1800 - Subtract the two like fractions:
576/1800 - 2250/1800 = 576 - 2250/1800 = -1674/1800 - After reducing the fraction, the answer is -93/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/25-90/72 8/50-90/72 24/25-90/72 8/75-90/72 40/25-90/72 56/25-90/72