Answers

Subtract 15/5 from 84/42

1^st number: 2 0/42, 2^nd number: 3 0/5

84/42 - 15/5 is -1/1.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 5 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 42 × 5 = 210,
   84/42 = 84 × 5/42 × 5 = 420/210
3. Likewise, for the 2nd fraction, since 5 × 42 = 210,
   15/5 = 15 × 42/5 × 42 = 630/210
4. Subtract the two like fractions:
   420/210 - 630/210 = 420 - 630/210 = -210/210
5. After reducing the fraction, the answer is -1/1

MathStep (Works offline)

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

Related: ⁸⁴/₄₂-³⁰/₅ ⁸⁴/₄₂-¹⁵/₁₀ ⁸⁴/₄₂-⁴⁵/₅ ⁸⁴/₄₂-⁷⁵/₅ ⁸⁴/₄₂-¹⁵/₂₅ ⁸⁴/₄₂-¹⁵/₃₅

Subtract Fractions Calculator