Answers

Add 18/84 and 10/40

18/84 + 10/40 is 13/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 84 × 10 = 840,
   18/84 = 18 × 10/84 × 10 = 180/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   10/40 = 10 × 21/40 × 21 = 210/840
4. Add the two like fractions:
   180/840 + 210/840 = 180 + 210/840 = 390/840
5. 390/840 simplified gives 13/28
6. So, 18/84 + 10/40 = 13/28

MathStep (Works offline)

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

Related: ³⁶/₈₄+¹⁰/₄₀ ¹⁸/₈₄+²⁰/₄₀ ¹⁸/₈₄+¹⁰/₈₀ ⁵⁴/₈₄+¹⁰/₄₀ ¹⁸/₈₄+³⁰/₄₀ ⁹⁰/₈₄+¹⁰/₄₀ ¹⁸/₈₄+⁵⁰/₄₀ ¹⁸/₈₄+⁷⁰/₄₀

Add Fractions Calculator