Subtract 10/3 from 20/70
1st number: 20/70, 2nd number: 3 1/3
20/70 - 10/3 is -64/21.
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,
20/70 = 20 × 3/70 × 3 = 60/210 - Likewise, for the 2nd fraction, since 3 × 70 = 210,
10/3 = 10 × 70/3 × 70 = 700/210 - Subtract the two like fractions:
60/210 - 700/210 = 60 - 700/210 = -640/210 - After reducing the fraction, the answer is -64/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70-10/3 20/70-20/3 20/70-10/6 60/70-10/3 20/70-30/3 20/70-10/9 20/70-50/3 20/70-10/15 20/70-70/3 20/70-10/21