Answers

Subtract 21/27 from 70/20

1^st number: 3 10/20, 2^nd number: 21/27

70/20 - 21/27 is 49/18.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 27 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 20 × 27 = 540,
   70/20 = 70 × 27/20 × 27 = 1890/540
3. Likewise, for the 2nd fraction, since 27 × 20 = 540,
   21/27 = 21 × 20/27 × 20 = 420/540
4. Subtract the two like fractions:
   1890/540 - 420/540 = 1890 - 420/540 = 1470/540
5. After reducing the fraction, the answer is 49/18
6. In mixed form: 213/18

MathStep (Works offline)

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

Related: ⁷⁰/₂₀-⁴²/₂₇ ⁷⁰/₄₀-²¹/₂₇ ⁷⁰/₂₀-²¹/₅₄ ⁷⁰/₂₀-⁶³/₂₇ ⁷⁰/₆₀-²¹/₂₇ ⁷⁰/₂₀-²¹/₈₁

Subtract Fractions Calculator