Question

Dena said, "To find 20% of a number, I should multiply by 0.20. So the sale price of an item will be 0.20p."

Which statement best describes Dena's reasoning?
1. Dena is correct.
2. Dena needs to subtract 0.20p from the regular price=p.
3. Dena should calculate the sale price as 20p and then divide by 100.
4. Dena is trying to solve a inconceivable problem because it doesn't mentions what the regular price is.​

Answer 1

Dena is correct (1)
That will give you 20% of that number, but if you wanted to find the price of the item, Dena needs to subtract 0.20(p) from the regular price.