Answers

Add 75/20 and 81/56

1^st number: 3 15/20, 2^nd number: 1 25/56

75/20 + 81/56 is 291/56.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 56 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 20 × 14 = 280,
   75/20 = 75 × 14/20 × 14 = 1050/280
3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
   81/56 = 81 × 5/56 × 5 = 405/280
4. Add the two like fractions:
   1050/280 + 405/280 = 1050 + 405/280 = 1455/280
5. 1455/280 simplified gives 291/56
6. So, 75/20 + 81/56 = 291/56
   In mixed form: 511/56

MathStep (Works offline)

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

Related: ⁷⁵/₄₀+⁸¹/₅₆ ⁷⁵/₆₀+⁸¹/₅₆

Add Fractions Calculator