Answers

Subtract 15/75 from 42/20

1^st number: 2 2/20, 2^nd number: 15/75

42/20 - 15/75 is 19/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 75 is 300
   
   Next, find the equivalent fraction of both fractional numbers with denominator 300
2. For the 1st fraction, since 20 × 15 = 300,
   42/20 = 42 × 15/20 × 15 = 630/300
3. Likewise, for the 2nd fraction, since 75 × 4 = 300,
   15/75 = 15 × 4/75 × 4 = 60/300
4. Subtract the two like fractions:
   630/300 - 60/300 = 630 - 60/300 = 570/300
5. After reducing the fraction, the answer is 19/10
6. In mixed form: 19/10

MathStep (Works offline)

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

Related: ⁸⁴/₂₀-¹⁵/₇₅ ⁴²/₂₀-³⁰/₇₅ ⁴²/₄₀-¹⁵/₇₅ ⁴²/₂₀-⁴⁵/₇₅ ⁴²/₆₀-¹⁵/₇₅

Subtract Fractions Calculator