MATH
posted by kayla .
i am in 4th grade doing my sisters homework don't ask why but i need help on this question.
 Explain why the cost of an item discounted 20% can be calculated by multiplying the original price by 0.8

MATH 
Ms. Sue
100%  20% = 80% = 0.8
When an item says it's 20% off, then the new price is 80% of the original price.
Respond to this Question
Similar Questions

Adv. Math
Can someone else explain it but more easier for an 8th grader ______________________________________ In January, gasoline cost $1.05 per gallon. In July, gasoline cost $1.20 per gallon. Find the percent of increase. Would the answer … 
algebra 2
When inflation causes the price of an item to increase the new cost C and the original cost c are related by the formula C=c(1+r)^n, where r is the rate of inflation per year as a decimal and n is the number of years. What would be … 
math
Explain why the cost of an item discounted 20% and then taxed 8% can be calculated by multiplying the original price by 0.864 
math
In a hypermarket promotional drive, the customers would only have to pay half of the original price on their second buy of the same item and one quarter of the original price on their third buy of the same item for some selected items. … 
information technology
write a pascal program which reads price of an item. the program should compute 25% discount on the original price, it should display the discounted amount and the discounted price of an item. 
math
The discounted price of a book is 85% of the original price. This is a savings of $3. A sales tax of 8% will be added to the discounted price. What is the original price? 
math10
An item was already discounted by 10% but had to be discounted by another 10 % to make the price even more attractive to customers. Overall, by how many percent was the item discounted? 
Math
A store discounted everything by 51%. The sales price of a scarf is $72.89. What was the original cost of the item? 
Math
A store discounted everything by 51%. The sales price of a scarf is $72.89. What was the original cost of the item? 
Math
A store discounted everything by 56%. The sales price of a dress is $202.92. What was the original cost of the item?