Answers

Add 70/30 and 90/84

1^st number: 2 10/30, 2^nd number: 1 6/84

70/30 + 90/84 is 143/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 30 × 14 = 420,
   70/30 = 70 × 14/30 × 14 = 980/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   90/84 = 90 × 5/84 × 5 = 450/420
4. Add the two like fractions:
   980/420 + 450/420 = 980 + 450/420 = 1430/420
5. 1430/420 simplified gives 143/42
6. So, 70/30 + 90/84 = 143/42
   In mixed form: 317/42

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