Answers

Add 81/30 and 50/40

1^st number: 2 21/30, 2^nd number: 1 10/40

81/30 + 50/40 is 79/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 30 × 4 = 120,
   81/30 = 81 × 4/30 × 4 = 324/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   50/40 = 50 × 3/40 × 3 = 150/120
4. Add the two like fractions:
   324/120 + 150/120 = 324 + 150/120 = 474/120
5. 474/120 simplified gives 79/20
6. So, 81/30 + 50/40 = 79/20
   In mixed form: 319/20

MathStep (Works offline)

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

Related: ⁸¹/₆₀+⁵⁰/₄₀ ⁸¹/₃₀+⁵⁰/₈₀ ⁸¹/₉₀+⁵⁰/₄₀

Add Fractions Calculator