Answers

Add 72/45 and 30/70

1^st number: 1 27/45, 2^nd number: 30/70

72/45 + 30/70 is 71/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 70 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 45 × 14 = 630,
   72/45 = 72 × 14/45 × 14 = 1008/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   30/70 = 30 × 9/70 × 9 = 270/630
4. Add the two like fractions:
   1008/630 + 270/630 = 1008 + 270/630 = 1278/630
5. 1278/630 simplified gives 71/35
6. So, 72/45 + 30/70 = 71/35
   In mixed form: 21/35

MathStep (Works offline)

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

Related: ⁷²/₄₅+⁶⁰/₇₀ ⁷²/₉₀+³⁰/₇₀ ⁷²/₄₅+⁹⁰/₇₀

Add Fractions Calculator