Answers

Add 25/84 and 90/70

1^st number: 25/84, 2^nd number: 1 20/70

25/84 + 90/70 is 19/12.

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,
   25/84 = 25 × 5/84 × 5 = 125/420
3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
   90/70 = 90 × 6/70 × 6 = 540/420
4. Add the two like fractions:
   125/420 + 540/420 = 125 + 540/420 = 665/420
5. 665/420 simplified gives 19/12
6. So, 25/84 + 90/70 = 19/12
   In mixed form: 17/12

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