Answers

Add 30/21 and 42/90

1^st number: 1 9/21, 2^nd number: 42/90

30/21 + 42/90 is 199/105.

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,
   30/21 = 30 × 30/21 × 30 = 900/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   42/90 = 42 × 7/90 × 7 = 294/630
4. Add the two like fractions:
   900/630 + 294/630 = 900 + 294/630 = 1194/630
5. 1194/630 simplified gives 199/105
6. So, 30/21 + 42/90 = 199/105
   In mixed form: 194/105

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