Answers

Add 42/40 and 12/80

1^st number: 1 2/40, 2^nd number: 12/80

42/40 + 12/80 is 6/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 40 × 2 = 80,
   42/40 = 42 × 2/40 × 2 = 84/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   12/80 = 12 × 1/80 × 1 = 12/80
4. Add the two like fractions:
   84/80 + 12/80 = 84 + 12/80 = 96/80
5. 96/80 simplified gives 6/5
6. So, 42/40 + 12/80 = 6/5
   In mixed form: 11/5

MathStep (Works offline)

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

Related: ⁸⁴/₄₀+¹²/₈₀ ⁴²/₄₀+²⁴/₈₀ ⁴²/₈₀+¹²/₈₀ ⁴²/₄₀+³⁶/₈₀ ⁴²/₄₀+⁶⁰/₈₀ ⁴²/₄₀+⁸⁴/₈₀

Add Fractions Calculator