Answers

Add 20/84 and 7/72

20/84 + 7/72 is 169/504.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 84 × 6 = 504,
   20/84 = 20 × 6/84 × 6 = 120/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   7/72 = 7 × 7/72 × 7 = 49/504
4. Add the two like fractions:
   120/504 + 49/504 = 120 + 49/504 = 169/504
5. So, 20/84 + 7/72 = 169/504

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