Answers

Add 24/42 and 21/72

24/42 + 21/72 is 145/168.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 42 × 12 = 504,
   24/42 = 24 × 12/42 × 12 = 288/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   21/72 = 21 × 7/72 × 7 = 147/504
4. Add the two like fractions:
   288/504 + 147/504 = 288 + 147/504 = 435/504
5. 435/504 simplified gives 145/168
6. So, 24/42 + 21/72 = 145/168

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