Answers

Add 18/90 and 84/45

1^st number: 18/90, 2^nd number: 1 39/45

18/90 + 84/45 is 31/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 45 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 90 × 1 = 90,
   18/90 = 18 × 1/90 × 1 = 18/90
3. Likewise, for the 2nd fraction, since 45 × 2 = 90,
   84/45 = 84 × 2/45 × 2 = 168/90
4. Add the two like fractions:
   18/90 + 168/90 = 18 + 168/90 = 186/90
5. 186/90 simplified gives 31/15
6. So, 18/90 + 84/45 = 31/15
   In mixed form: 21/15

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