A pair of jeans is on sale for 25% off the original price. Which expression represents the sale price? If the original price of the jeans is $40, evaluate the expression to find the sale price?

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Answer 1 · 2016-06-29T19:03:14

#x = $30#

Remember that if there is a 25% discount, then the amount you are paying represents 75%. We know the original price (ie 100%)

There are several methods.
Simplest: Find 25% of the$40 and subtract to find the price to be paid.

#25% of 40 = 25/100 xx 40=10# discount

price = #40-10 =$30#

Second method. Find 75% immediately

#75% of 40 = 75/100 xx 40 = $30#

You can do any percentage question using the concept of direct proportion.

#40/100 = x/75 " if $40 is 100%, how much is 75%?"#

#100x = 75 xx40" cross-multiply"#

#x = (75xx40)/100 " this a possible expression for the sale price"#

#x = $30#