Answers

Add 70/18 and 72/28

1^st number: 3 16/18, 2^nd number: 2 16/28

70/18 + 72/28 is 407/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 28 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 18 × 14 = 252,
   70/18 = 70 × 14/18 × 14 = 980/252
3. Likewise, for the 2nd fraction, since 28 × 9 = 252,
   72/28 = 72 × 9/28 × 9 = 648/252
4. Add the two like fractions:
   980/252 + 648/252 = 980 + 648/252 = 1628/252
5. 1628/252 simplified gives 407/63
6. So, 70/18 + 72/28 = 407/63
   In mixed form: 629/63

MathStep (Works offline)

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

Related: ⁷⁰/₃₆+⁷²/₂₈ ⁷⁰/₁₈+⁷²/₅₆ ⁷⁰/₅₄+⁷²/₂₈ ⁷⁰/₁₈+⁷²/₈₄ ⁷⁰/₉₀+⁷²/₂₈

Add Fractions Calculator