Answer:
Multiple questions. See answer and explanations below.
Explanation:
Percentages are a number with a unit (the percentage sign). To convert between percentages and regular numbers, remember that 100% = 1.
For instance, if you ate 1 cookie, you ate 100% of it.
If you work regularly with dollars and cents, you can imagine percents are cents, and the real number is the dollar equivalent. If you have 100 cents (pennies), that's 1 dollar. If you have 37 cents, that's 0.37 dollars.
Often percentages are used to represent a part of a whole (percentages less than 100%), although percentages can be used to represent more than one whole (percentages above 100%).
Problem 1.
In this case, 75% of the tickets were sold.
75% ==> 0.75
Often in math story problems especially involving percentages, "of" means multiply. So, 75% of the tickets, means multiply 0.75 * the number of tickets.
0.75 * 1200 = 900 tickets sold
Problem 2.
In this case, each tire is normally $48.00. Now, they're 20% off.
When something is a "percentage off", we need to find what that percentage of the whole is, and subtract it off the original value.
20% of 48 dollars is
0.20 * 48 = 9.60
So, $48 - $9.60 = $38.40
The sale price is $38.40
Problem 3.
For this problem, the blouse was originally 28 dollars. If the bought it for 25% off, we need to subtract 25% of the original 28 from the original $28 price
First, we'll find 25% of the original 28
0.25 * 28 = 7
Second, we'll subtract this off the original price
28 - 7 = 21
The sale price was $21.