Answers

Add 9/84 and 90/70

1^st number: 9/84, 2^nd number: 1 20/70

9/84 + 90/70 is 39/28.

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,
   9/84 = 9 × 5/84 × 5 = 45/420
3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
   90/70 = 90 × 6/70 × 6 = 540/420
4. Add the two like fractions:
   45/420 + 540/420 = 45 + 540/420 = 585/420
5. 585/420 simplified gives 39/28
6. So, 9/84 + 90/70 = 39/28
   In mixed form: 111/28

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