Answers

Add 60/18 and 21/90

1^st number: 3 6/18, 2^nd number: 21/90

60/18 + 21/90 is 107/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 90 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 18 × 5 = 90,
   60/18 = 60 × 5/18 × 5 = 300/90
3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
   21/90 = 21 × 1/90 × 1 = 21/90
4. Add the two like fractions:
   300/90 + 21/90 = 300 + 21/90 = 321/90
5. 321/90 simplified gives 107/30
6. So, 60/18 + 21/90 = 107/30
   In mixed form: 317/30

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