Answers

Add 4/12 and 21/72

4/12 + 21/72 is 5/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 72 is 72
   
   Next, find the equivalent fraction of both fractional numbers with denominator 72
2. For the 1st fraction, since 12 × 6 = 72,
   4/12 = 4 × 6/12 × 6 = 24/72
3. Likewise, for the 2nd fraction, since 72 × 1 = 72,
   21/72 = 21 × 1/72 × 1 = 21/72
4. Add the two like fractions:
   24/72 + 21/72 = 24 + 21/72 = 45/72
5. 45/72 simplified gives 5/8
6. So, 4/12 + 21/72 = 5/8

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