Answers

Add 70/30 and 90/40

1^st number: 2 10/30, 2^nd number: 2 10/40

70/30 + 90/40 is 55/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 30 × 4 = 120,
   70/30 = 70 × 4/30 × 4 = 280/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   90/40 = 90 × 3/40 × 3 = 270/120
4. Add the two like fractions:
   280/120 + 270/120 = 280 + 270/120 = 550/120
5. 550/120 simplified gives 55/12
6. So, 70/30 + 90/40 = 55/12
   In mixed form: 47/12

MathStep (Works offline)

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

Related: ⁷⁰/₆₀+⁹⁰/₄₀ ⁷⁰/₃₀+⁹⁰/₈₀ ⁷⁰/₉₀+⁹⁰/₄₀

Add Fractions Calculator