Answers

Add 80/40 and 3/45

1^st number: 2 0/40, 2^nd number: 3/45

80/40 + 3/45 is 31/15.

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,
   80/40 = 80 × 9/40 × 9 = 720/360
3. Likewise, for the 2nd fraction, since 45 × 8 = 360,
   3/45 = 3 × 8/45 × 8 = 24/360
4. Add the two like fractions:
   720/360 + 24/360 = 720 + 24/360 = 744/360
5. 744/360 simplified gives 31/15
6. So, 80/40 + 3/45 = 31/15
   In mixed form: 21/15

MathStep (Works offline)

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

Related: ⁸⁰/₄₀+⁶/₄₅ ⁸⁰/₄₀+³/₉₀ ⁸⁰/₄₀+⁹/₄₅ ⁸⁰/₄₀+¹⁵/₄₅ ⁸⁰/₄₀+²¹/₄₅

Add Fractions Calculator