Answers

Add 25/84 and 20/70

25/84 + 20/70 is 7/12.

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,
   20/70 = 20 × 6/70 × 6 = 120/420
4. Add the two like fractions:
   125/420 + 120/420 = 125 + 120/420 = 245/420
5. 245/420 simplified gives 7/12
6. So, 25/84 + 20/70 = 7/12

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