Answers

Add 60/40 and 70/81

1^st number: 1 20/40, 2^nd number: 70/81

60/40 + 70/81 is 383/162.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 81 is 3240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3240
2. For the 1st fraction, since 40 × 81 = 3240,
   60/40 = 60 × 81/40 × 81 = 4860/3240
3. Likewise, for the 2nd fraction, since 81 × 40 = 3240,
   70/81 = 70 × 40/81 × 40 = 2800/3240
4. Add the two like fractions:
   4860/3240 + 2800/3240 = 4860 + 2800/3240 = 7660/3240
5. 7660/3240 simplified gives 383/162
6. So, 60/40 + 70/81 = 383/162
   In mixed form: 259/162

MathStep (Works offline)

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

Related: ⁶⁰/₈₀+⁷⁰/₈₁

Add Fractions Calculator