Answers

Add 60/21 and 4/90

1^st number: 2 18/21, 2^nd number: 4/90

60/21 + 4/90 is 914/315.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 21 × 30 = 630,
   60/21 = 60 × 30/21 × 30 = 1800/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   4/90 = 4 × 7/90 × 7 = 28/630
4. Add the two like fractions:
   1800/630 + 28/630 = 1800 + 28/630 = 1828/630
5. 1828/630 simplified gives 914/315
6. So, 60/21 + 4/90 = 914/315
   In mixed form: 2284/315

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