Answers

Add 21/72 and 24/60

21/72 + 24/60 is 83/120.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 60 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   21/72 = 21 × 5/72 × 5 = 105/360
3. Likewise, for the 2nd fraction, since 60 × 6 = 360,
   24/60 = 24 × 6/60 × 6 = 144/360
4. Add the two like fractions:
   105/360 + 144/360 = 105 + 144/360 = 249/360
5. 249/360 simplified gives 83/120
6. So, 21/72 + 24/60 = 83/120

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