Answers

Add 90/84 and 45/70

1^st number: 1 6/84, 2^nd number: 45/70

90/84 + 45/70 is 12/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 70 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   90/84 = 90 × 5/84 × 5 = 450/420
3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
   45/70 = 45 × 6/70 × 6 = 270/420
4. Add the two like fractions:
   450/420 + 270/420 = 450 + 270/420 = 720/420
5. 720/420 simplified gives 12/7
6. So, 90/84 + 45/70 = 12/7
   In mixed form: 15/7

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