Answers

Add 15/84 and 54/70

15/84 + 54/70 is 19/20.

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,
   15/84 = 15 × 5/84 × 5 = 75/420
3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
   54/70 = 54 × 6/70 × 6 = 324/420
4. Add the two like fractions:
   75/420 + 324/420 = 75 + 324/420 = 399/420
5. 399/420 simplified gives 19/20
6. So, 15/84 + 54/70 = 19/20

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