Answers

Add 7/84 and 12/45

7/84 + 12/45 is 7/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 45 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 84 × 15 = 1260,
   7/84 = 7 × 15/84 × 15 = 105/1260
3. Likewise, for the 2nd fraction, since 45 × 28 = 1260,
   12/45 = 12 × 28/45 × 28 = 336/1260
4. Add the two like fractions:
   105/1260 + 336/1260 = 105 + 336/1260 = 441/1260
5. 441/1260 simplified gives 7/20
6. So, 7/84 + 12/45 = 7/20

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