Answers

Add 84/7 and 90/30

1^st number: 12 0/7, 2^nd number: 3 0/30

84/7 + 90/30 is 15/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 30 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 7 × 30 = 210,
   84/7 = 84 × 30/7 × 30 = 2520/210
3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
   90/30 = 90 × 7/30 × 7 = 630/210
4. Add the two like fractions:
   2520/210 + 630/210 = 2520 + 630/210 = 3150/210
5. 3150/210 simplified gives 15/1
6. So, 84/7 + 90/30 = 15/1

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