Subtract 7/90 from 7/25
7/25 - 7/90 is 91/450.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 25 × 18 = 450,
7/25 = 7 × 18/25 × 18 = 126/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
7/90 = 7 × 5/90 × 5 = 35/450 - Subtract the two like fractions:
126/450 - 35/450 = 126 - 35/450 = 91/450
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/25-7/90 7/25-14/90 7/50-7/90 21/25-7/90 7/25-21/90 7/75-7/90 35/25-7/90 7/25-35/90 49/25-7/90 7/25-49/90