Answers

Add 45/40 and 75/80

1^st number: 1 5/40, 2^nd number: 75/80

45/40 + 75/80 is 33/16.

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,
   45/40 = 45 × 2/40 × 2 = 90/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   75/80 = 75 × 1/80 × 1 = 75/80
4. Add the two like fractions:
   90/80 + 75/80 = 90 + 75/80 = 165/80
5. 165/80 simplified gives 33/16
6. So, 45/40 + 75/80 = 33/16
   In mixed form: 21/16

MathStep (Works offline)

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

Related: ⁹⁰/₄₀+⁷⁵/₈₀ ⁴⁵/₈₀+⁷⁵/₈₀

Add Fractions Calculator