Answers

Add 70/84 and 25/70

70/84 + 25/70 is 25/21.

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,
   70/84 = 70 × 5/84 × 5 = 350/420
3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
   25/70 = 25 × 6/70 × 6 = 150/420
4. Add the two like fractions:
   350/420 + 150/420 = 350 + 150/420 = 500/420
5. 500/420 simplified gives 25/21
6. So, 70/84 + 25/70 = 25/21
   In mixed form: 14/21

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