Answers

Add 90/84 and 21/35

1^st number: 1 6/84, 2^nd number: 21/35

90/84 + 21/35 is 117/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 35 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 35 × 12 = 420,
   21/35 = 21 × 12/35 × 12 = 252/420
4. Add the two like fractions:
   450/420 + 252/420 = 450 + 252/420 = 702/420
5. 702/420 simplified gives 117/70
6. So, 90/84 + 21/35 = 117/70
   In mixed form: 147/70

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