Answers

Subtract 42/20 from 84/25

1^st number: 3 9/25, 2^nd number: 2 2/20

84/25 - 42/20 is 63/50.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 25 and 20 is 100
   
   Next, find the equivalent fraction of both fractional numbers with denominator 100
2. For the 1st fraction, since 25 × 4 = 100,
   84/25 = 84 × 4/25 × 4 = 336/100
3. Likewise, for the 2nd fraction, since 20 × 5 = 100,
   42/20 = 42 × 5/20 × 5 = 210/100
4. Subtract the two like fractions:
   336/100 - 210/100 = 336 - 210/100 = 126/100
5. After reducing the fraction, the answer is 63/50
6. In mixed form: 113/50

MathStep (Works offline)

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

Related: ⁸⁴/₂₅-⁸⁴/₂₀ ⁸⁴/₅₀-⁴²/₂₀ ⁸⁴/₂₅-⁴²/₄₀ ⁸⁴/₇₅-⁴²/₂₀ ⁸⁴/₂₅-⁴²/₆₀

Subtract Fractions Calculator