Answers

Add 81/20 and 6/90

1^st number: 4 1/20, 2^nd number: 6/90

81/20 + 6/90 is 247/60.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   81/20 = 81 × 9/20 × 9 = 729/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   6/90 = 6 × 2/90 × 2 = 12/180
4. Add the two like fractions:
   729/180 + 12/180 = 729 + 12/180 = 741/180
5. 741/180 simplified gives 247/60
6. So, 81/20 + 6/90 = 247/60
   In mixed form: 47/60

MathStep (Works offline)

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

Related: ⁸¹/₂₀+¹²/₉₀ ⁸¹/₄₀+⁶/₉₀ ⁸¹/₂₀+¹⁸/₉₀ ⁸¹/₆₀+⁶/₉₀ ⁸¹/₂₀+³⁰/₉₀ ⁸¹/₂₀+⁴²/₉₀

Add Fractions Calculator