Subtract 10/21 from 84/70
1st number: 1 14/70, 2nd number: 10/21
84/70 - 10/21 is 76/105.
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,
84/70 = 84 × 3/70 × 3 = 252/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
10/21 = 10 × 10/21 × 10 = 100/210 - Subtract the two like fractions:
252/210 - 100/210 = 252 - 100/210 = 152/210 - After reducing the fraction, the answer is 76/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/70-20/21 84/70-10/42 84/70-30/21 84/70-10/63 84/70-50/21 84/70-70/21