Answers

Add 54/84 and 15/20

54/84 + 15/20 is 39/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   54/84 = 54 × 5/84 × 5 = 270/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   15/20 = 15 × 21/20 × 21 = 315/420
4. Add the two like fractions:
   270/420 + 315/420 = 270 + 315/420 = 585/420
5. 585/420 simplified gives 39/28
6. So, 54/84 + 15/20 = 39/28
   In mixed form: 111/28

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