Answers

Add 28/49 and 81/40

1^st number: 28/49, 2^nd number: 2 1/40

28/49 + 81/40 is 727/280.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 49 and 40 is 1960
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1960
2. For the 1st fraction, since 49 × 40 = 1960,
   28/49 = 28 × 40/49 × 40 = 1120/1960
3. Likewise, for the 2nd fraction, since 40 × 49 = 1960,
   81/40 = 81 × 49/40 × 49 = 3969/1960
4. Add the two like fractions:
   1120/1960 + 3969/1960 = 1120 + 3969/1960 = 5089/1960
5. 5089/1960 simplified gives 727/280
6. So, 28/49 + 81/40 = 727/280
   In mixed form: 2167/280

MathStep (Works offline)

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

Related: ⁵⁶/₄₉+⁸¹/₄₀ ²⁸/₉₈+⁸¹/₄₀ ²⁸/₄₉+⁸¹/₈₀ ⁸⁴/₄₉+⁸¹/₄₀

Add Fractions Calculator