Answers

Add 75/12 and 72/80

1^st number: 6 3/12, 2^nd number: 72/80

75/12 + 72/80 is 143/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 12 × 20 = 240,
   75/12 = 75 × 20/12 × 20 = 1500/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   72/80 = 72 × 3/80 × 3 = 216/240
4. Add the two like fractions:
   1500/240 + 216/240 = 1500 + 216/240 = 1716/240
5. 1716/240 simplified gives 143/20
6. So, 75/12 + 72/80 = 143/20
   In mixed form: 73/20

MathStep (Works offline)

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

Related: ⁷⁵/₂₄+⁷²/₈₀ ⁷⁵/₃₆+⁷²/₈₀ ⁷⁵/₆₀+⁷²/₈₀ ⁷⁵/₈₄+⁷²/₈₀

Add Fractions Calculator