Answers

Add 84/42 and 48/40

1^st number: 2 0/42, 2^nd number: 1 8/40

84/42 + 48/40 is 16/5.

Steps for adding 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,
   84/42 = 84 × 20/42 × 20 = 1680/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   48/40 = 48 × 21/40 × 21 = 1008/840
4. Add the two like fractions:
   1680/840 + 1008/840 = 1680 + 1008/840 = 2688/840
5. 2688/840 simplified gives 16/5
6. So, 84/42 + 48/40 = 16/5
   In mixed form: 31/5

MathStep (Works offline)

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

Related: ⁸⁴/₄₂+⁹⁶/₄₀ ⁸⁴/₄₂+⁴⁸/₈₀

Add Fractions Calculator