Answers

Add 20/84 and 3/70

20/84 + 3/70 is 59/210.

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,
   20/84 = 20 × 5/84 × 5 = 100/420
3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
   3/70 = 3 × 6/70 × 6 = 18/420
4. Add the two like fractions:
   100/420 + 18/420 = 100 + 18/420 = 118/420
5. 118/420 simplified gives 59/210
6. So, 20/84 + 3/70 = 59/210

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