Answers

Subtract 84/40 from 24/42

1^st number: 24/42, 2^nd number: 2 4/40

24/42 - 84/40 is -107/70.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 42 × 20 = 840,
   24/42 = 24 × 20/42 × 20 = 480/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   84/40 = 84 × 21/40 × 21 = 1764/840
4. Subtract the two like fractions:
   480/840 - 1764/840 = 480 - 1764/840 = -1284/840
5. After reducing the fraction, the answer is -107/70

MathStep (Works offline)

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

Related: ⁴⁸/₄₂-⁸⁴/₄₀ ²⁴/₈₄-⁸⁴/₄₀ ²⁴/₄₂-⁸⁴/₈₀ ⁷²/₄₂-⁸⁴/₄₀

Subtract Fractions Calculator