Subtract 56/21 from 75/70
1st number: 1 5/70, 2nd number: 2 14/21
75/70 - 56/21 is -67/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
75/70 = 75 × 3/70 × 3 = 225/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
56/21 = 56 × 10/21 × 10 = 560/210 - Subtract the two like fractions:
225/210 - 560/210 = 225 - 560/210 = -335/210 - After reducing the fraction, the answer is -67/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/70-56/42 75/70-56/63