Answers

Add 84/10 and 90/84

1^st number: 8 4/10, 2^nd number: 1 6/84

84/10 + 90/84 is 663/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 10 × 42 = 420,
   84/10 = 84 × 42/10 × 42 = 3528/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   90/84 = 90 × 5/84 × 5 = 450/420
4. Add the two like fractions:
   3528/420 + 450/420 = 3528 + 450/420 = 3978/420
5. 3978/420 simplified gives 663/70
6. So, 84/10 + 90/84 = 663/70
   In mixed form: 933/70

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