Answers

Add 84/15 and 90/84

1^st number: 5 9/15, 2^nd number: 1 6/84

84/15 + 90/84 is 467/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 15 × 28 = 420,
   84/15 = 84 × 28/15 × 28 = 2352/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   90/84 = 90 × 5/84 × 5 = 450/420
4. Add the two like fractions:
   2352/420 + 450/420 = 2352 + 450/420 = 2802/420
5. 2802/420 simplified gives 467/70
6. So, 84/15 + 90/84 = 467/70
   In mixed form: 647/70

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