Answers

Subtract 40/49 from 84/42

1^st number: 2 0/42, 2^nd number: 40/49

84/42 - 40/49 is 58/49.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 49 is 294
   
   Next, find the equivalent fraction of both fractional numbers with denominator 294
2. For the 1st fraction, since 42 × 7 = 294,
   84/42 = 84 × 7/42 × 7 = 588/294
3. Likewise, for the 2nd fraction, since 49 × 6 = 294,
   40/49 = 40 × 6/49 × 6 = 240/294
4. Subtract the two like fractions:
   588/294 - 240/294 = 588 - 240/294 = 348/294
5. After reducing the fraction, the answer is 58/49
6. In mixed form: 19/49

MathStep (Works offline)

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

Related: ⁸⁴/₄₂-⁸⁰/₄₉ ⁸⁴/₄₂-⁴⁰/₉₈

Subtract Fractions Calculator