Answers

Add 72/28 and 12/81

1^st number: 2 16/28, 2^nd number: 12/81

72/28 + 12/81 is 514/189.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 81 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 28 × 81 = 2268,
   72/28 = 72 × 81/28 × 81 = 5832/2268
3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
   12/81 = 12 × 28/81 × 28 = 336/2268
4. Add the two like fractions:
   5832/2268 + 336/2268 = 5832 + 336/2268 = 6168/2268
5. 6168/2268 simplified gives 514/189
6. So, 72/28 + 12/81 = 514/189
   In mixed form: 2136/189

MathStep (Works offline)

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

Related: ⁷²/₂₈+²⁴/₈₁ ⁷²/₅₆+¹²/₈₁ ⁷²/₂₈+³⁶/₈₁ ⁷²/₈₄+¹²/₈₁ ⁷²/₂₈+⁶⁰/₈₁ ⁷²/₂₈+⁸⁴/₈₁

Add Fractions Calculator