Answers

Add 70/15 and 54/72

1^st number: 4 10/15, 2^nd number: 54/72

70/15 + 54/72 is 65/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 15 × 24 = 360,
   70/15 = 70 × 24/15 × 24 = 1680/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   54/72 = 54 × 5/72 × 5 = 270/360
4. Add the two like fractions:
   1680/360 + 270/360 = 1680 + 270/360 = 1950/360
5. 1950/360 simplified gives 65/12
6. So, 70/15 + 54/72 = 65/12
   In mixed form: 55/12

MathStep (Works offline)

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

Related: ⁷⁰/₃₀+⁵⁴/₇₂ ⁷⁰/₄₅+⁵⁴/₇₂ ⁷⁰/₇₅+⁵⁴/₇₂

Add Fractions Calculator