Answers

Add 25/20 and 90/80

1^st number: 1 5/20, 2^nd number: 1 10/80

25/20 + 90/80 is 19/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 20 × 4 = 80,
   25/20 = 25 × 4/20 × 4 = 100/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   90/80 = 90 × 1/80 × 1 = 90/80
4. Add the two like fractions:
   100/80 + 90/80 = 100 + 90/80 = 190/80
5. 190/80 simplified gives 19/8
6. So, 25/20 + 90/80 = 19/8
   In mixed form: 23/8

MathStep (Works offline)

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

Related: ⁵⁰/₂₀+⁹⁰/₈₀ ²⁵/₄₀+⁹⁰/₈₀ ⁷⁵/₂₀+⁹⁰/₈₀ ²⁵/₆₀+⁹⁰/₈₀

Add Fractions Calculator