Answers

Add 72/45 and 27/90

1^st number: 1 27/45, 2^nd number: 27/90

72/45 + 27/90 is 19/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 90 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 45 × 2 = 90,
   72/45 = 72 × 2/45 × 2 = 144/90
3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
   27/90 = 27 × 1/90 × 1 = 27/90
4. Add the two like fractions:
   144/90 + 27/90 = 144 + 27/90 = 171/90
5. 171/90 simplified gives 19/10
6. So, 72/45 + 27/90 = 19/10
   In mixed form: 19/10

MathStep (Works offline)

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

Related: ⁷²/₄₅+⁵⁴/₉₀ ⁷²/₉₀+²⁷/₉₀ ⁷²/₄₅+⁸¹/₉₀

Add Fractions Calculator