Subtract 10/3 from 21/70
1st number: 21/70, 2nd number: 3 1/3
21/70 - 10/3 is -91/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 3 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
21/70 = 21 × 3/70 × 3 = 63/210 - Likewise, for the 2nd fraction, since 3 × 70 = 210,
10/3 = 10 × 70/3 × 70 = 700/210 - Subtract the two like fractions:
63/210 - 700/210 = 63 - 700/210 = -637/210 - After reducing the fraction, the answer is -91/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70-10/3 21/70-20/3 21/70-10/6 63/70-10/3 21/70-30/3 21/70-10/9 21/70-50/3 21/70-10/15 21/70-70/3 21/70-10/21