Answers

Subtract 84/21 from 70/10

1^st number: 7 0/10, 2^nd number: 4 0/21

70/10 - 84/21 is 3/1.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 21 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 10 × 21 = 210,
   70/10 = 70 × 21/10 × 21 = 1470/210
3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
   84/21 = 84 × 10/21 × 10 = 840/210
4. Subtract the two like fractions:
   1470/210 - 840/210 = 1470 - 840/210 = 630/210
5. After reducing the fraction, the answer is 3/1

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁷⁰/₂₀-⁸⁴/₂₁ ⁷⁰/₁₀-⁸⁴/₄₂ ⁷⁰/₃₀-⁸⁴/₂₁ ⁷⁰/₁₀-⁸⁴/₆₃ ⁷⁰/₅₀-⁸⁴/₂₁

Subtract Fractions Calculator