Answers

Add 21/84 and 10/72

21/84 + 10/72 is 7/18.

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,
   21/84 = 21 × 6/84 × 6 = 126/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   10/72 = 10 × 7/72 × 7 = 70/504
4. Add the two like fractions:
   126/504 + 70/504 = 126 + 70/504 = 196/504
5. 196/504 simplified gives 7/18
6. So, 21/84 + 10/72 = 7/18

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