Answers

Add 8/42 and 84/40

1^st number: 8/42, 2^nd number: 2 4/40

8/42 + 84/40 is 481/210.

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,
   8/42 = 8 × 20/42 × 20 = 160/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   84/40 = 84 × 21/40 × 21 = 1764/840
4. Add the two like fractions:
   160/840 + 1764/840 = 160 + 1764/840 = 1924/840
5. 1924/840 simplified gives 481/210
6. So, 8/42 + 84/40 = 481/210
   In mixed form: 261/210

MathStep (Works offline)

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

Related: ¹⁶/₄₂+⁸⁴/₄₀ ⁸/₈₄+⁸⁴/₄₀ ⁸/₄₂+⁸⁴/₈₀ ²⁴/₄₂+⁸⁴/₄₀ ⁴⁰/₄₂+⁸⁴/₄₀ ⁵⁶/₄₂+⁸⁴/₄₀

Add Fractions Calculator