Answers

Add 72/90 and 72/12

1^st number: 72/90, 2^nd number: 6 0/12

72/90 + 72/12 is 34/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 12 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 90 × 2 = 180,
   72/90 = 72 × 2/90 × 2 = 144/180
3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
   72/12 = 72 × 15/12 × 15 = 1080/180
4. Add the two like fractions:
   144/180 + 1080/180 = 144 + 1080/180 = 1224/180
5. 1224/180 simplified gives 34/5
6. So, 72/90 + 72/12 = 34/5
   In mixed form: 64/5

MathStep (Works offline)

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

Related: ⁷²/₉₀+⁷²/₂₄ ⁷²/₉₀+⁷²/₃₆ ⁷²/₉₀+⁷²/₆₀ ⁷²/₉₀+⁷²/₈₄

Add Fractions Calculator