Answers

Add 20/40 and 84/45

1^st number: 20/40, 2^nd number: 1 39/45

20/40 + 84/45 is 71/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 45 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 40 × 9 = 360,
   20/40 = 20 × 9/40 × 9 = 180/360
3. Likewise, for the 2nd fraction, since 45 × 8 = 360,
   84/45 = 84 × 8/45 × 8 = 672/360
4. Add the two like fractions:
   180/360 + 672/360 = 180 + 672/360 = 852/360
5. 852/360 simplified gives 71/30
6. So, 20/40 + 84/45 = 71/30
   In mixed form: 211/30

MathStep (Works offline)

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

Related: ²⁰/₈₀+⁸⁴/₄₅ ²⁰/₄₀+⁸⁴/₉₀ ⁶⁰/₄₀+⁸⁴/₄₅

Add Fractions Calculator