Answers

Subtract 15/84 from 84/40

1^st number: 2 4/40, 2^nd number: 15/84

84/40 - 15/84 is 269/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 84 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 40 × 21 = 840,
   84/40 = 84 × 21/40 × 21 = 1764/840
3. Likewise, for the 2nd fraction, since 84 × 10 = 840,
   15/84 = 15 × 10/84 × 10 = 150/840
4. Subtract the two like fractions:
   1764/840 - 150/840 = 1764 - 150/840 = 1614/840
5. After reducing the fraction, the answer is 269/140
6. In mixed form: 1129/140

MathStep (Works offline)

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

Related: ⁸⁴/₄₀-³⁰/₈₄ ⁸⁴/₈₀-¹⁵/₈₄ ⁸⁴/₄₀-⁴⁵/₈₄ ⁸⁴/₄₀-⁷⁵/₈₄

Subtract Fractions Calculator