Answers

Add 28/10 and 54/72

1^st number: 2 8/10, 2^nd number: 54/72

28/10 + 54/72 is 71/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 10 × 36 = 360,
   28/10 = 28 × 36/10 × 36 = 1008/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   54/72 = 54 × 5/72 × 5 = 270/360
4. Add the two like fractions:
   1008/360 + 270/360 = 1008 + 270/360 = 1278/360
5. 1278/360 simplified gives 71/20
6. So, 28/10 + 54/72 = 71/20
   In mixed form: 311/20

MathStep (Works offline)

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

Related: ⁵⁶/₁₀+⁵⁴/₇₂ ²⁸/₂₀+⁵⁴/₇₂ ⁸⁴/₁₀+⁵⁴/₇₂ ²⁸/₃₀+⁵⁴/₇₂ ²⁸/₅₀+⁵⁴/₇₂ ²⁸/₇₀+⁵⁴/₇₂

Add Fractions Calculator