Answers

Add 42/21 and 45/30

1^st number: 2 0/21, 2^nd number: 1 15/30

42/21 + 45/30 is 7/2.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 30 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 21 × 10 = 210,
   42/21 = 42 × 10/21 × 10 = 420/210
3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
   45/30 = 45 × 7/30 × 7 = 315/210
4. Add the two like fractions:
   420/210 + 315/210 = 420 + 315/210 = 735/210
5. 735/210 simplified gives 7/2
6. So, 42/21 + 45/30 = 7/2
   In mixed form: 31/2

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