Answers

Subtract 10/21 from 84/45

1^st number: 1 39/45, 2^nd number: 10/21

84/45 - 10/21 is 146/105.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 21 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 45 × 7 = 315,
   84/45 = 84 × 7/45 × 7 = 588/315
3. Likewise, for the 2nd fraction, since 21 × 15 = 315,
   10/21 = 10 × 15/21 × 15 = 150/315
4. Subtract the two like fractions:
   588/315 - 150/315 = 588 - 150/315 = 438/315
5. After reducing the fraction, the answer is 146/105
6. In mixed form: 141/105

MathStep (Works offline)

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

Related: ⁸⁴/₄₅-²⁰/₂₁ ⁸⁴/₉₀-¹⁰/₂₁ ⁸⁴/₄₅-¹⁰/₄₂ ⁸⁴/₄₅-³⁰/₂₁ ⁸⁴/₄₅-¹⁰/₆₃ ⁸⁴/₄₅-⁵⁰/₂₁ ⁸⁴/₄₅-⁷⁰/₂₁

Subtract Fractions Calculator