Respuesta :
9514 1404 393
Answer:
A. 12
Step-by-step explanation:
"Of" means "times" when you're talking about percentages. 40% of 30 means 40% times 30:
40% × 30 = 40/100 × 30 = 1200/100 = 12
40% of 30 days is 12 days
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In general "%" and "/100" are interchangeable. They mean the same thing.