Answers

Add 18/72 and 7/84

18/72 + 7/84 is 1/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 84 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   18/72 = 18 × 7/72 × 7 = 126/504
3. Likewise, for the 2nd fraction, since 84 × 6 = 504,
   7/84 = 7 × 6/84 × 6 = 42/504
4. Add the two like fractions:
   126/504 + 42/504 = 126 + 42/504 = 168/504
5. 168/504 simplified gives 1/3
6. So, 18/72 + 7/84 = 1/3

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