Answers

Add 81/25 and 28/90

1^st number: 3 6/25, 2^nd number: 28/90

81/25 + 28/90 is 799/225.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 25 and 90 is 450
   
   Next, find the equivalent fraction of both fractional numbers with denominator 450
2. For the 1st fraction, since 25 × 18 = 450,
   81/25 = 81 × 18/25 × 18 = 1458/450
3. Likewise, for the 2nd fraction, since 90 × 5 = 450,
   28/90 = 28 × 5/90 × 5 = 140/450
4. Add the two like fractions:
   1458/450 + 140/450 = 1458 + 140/450 = 1598/450
5. 1598/450 simplified gives 799/225
6. So, 81/25 + 28/90 = 799/225
   In mixed form: 3124/225

MathStep (Works offline)

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

Related: ⁸¹/₂₅+⁵⁶/₉₀ ⁸¹/₅₀+²⁸/₉₀ ⁸¹/₂₅+⁸⁴/₉₀ ⁸¹/₇₅+²⁸/₉₀

Add Fractions Calculator