Answers

Add 3/84 and 90/70

1^st number: 3/84, 2^nd number: 1 20/70

3/84 + 90/70 is 37/28.

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,
   3/84 = 3 × 5/84 × 5 = 15/420
3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
   90/70 = 90 × 6/70 × 6 = 540/420
4. Add the two like fractions:
   15/420 + 540/420 = 15 + 540/420 = 555/420
5. 555/420 simplified gives 37/28
6. So, 3/84 + 90/70 = 37/28
   In mixed form: 19/28

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