Subtract 7/90 from 25/70
25/70 - 7/90 is 88/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
25/70 = 25 × 9/70 × 9 = 225/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
7/90 = 7 × 7/90 × 7 = 49/630 - Subtract the two like fractions:
225/630 - 49/630 = 225 - 49/630 = 176/630 - After reducing the fraction, the answer is 88/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/70-7/90 25/70-14/90 75/70-7/90 25/70-21/90 25/70-35/90 25/70-49/90