Subtract 56/90 from 25/21
1st number: 1 4/21, 2nd number: 56/90
25/21 - 56/90 is 179/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
25/21 = 25 × 30/21 × 30 = 750/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
56/90 = 56 × 7/90 × 7 = 392/630 - Subtract the two like fractions:
750/630 - 392/630 = 750 - 392/630 = 358/630 - After reducing the fraction, the answer is 179/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21-56/90 25/42-56/90 75/21-56/90 25/63-56/90