Help me with my math please

a department store is having an after christmas sale in which coats are discounted 30% and suits are discounted 25% of joe purchases a coat that was originally $300 and a suit that was originally $400 how much money did he spend?

.7*300+.75*400=510

If the discount is 30% on coats that means Joe will spend 70% of the original cost of $300, so he will spend $210 for the coat.

If the discound is 25% on suits that means Joe will spend 75% of the original cost of $400 so he will spend $300 for the suit.

Joe's total spent is $210 + $300 or $510 total

Remember to find 70% of the original multiply by .7 and to find 75% mulltiply by .75.

.7*300+.75*400=510

Agreed on this. The .7 comes from 100% - 30% = 70%. and the .75 comes from 100% - 25% - 75%. It is easier to use this method for calculating vs. taking 30% of 300 then subtracting that from 300 (the orig value)....and so on.

$300 * .3 = $90 $300 - $90 = $210
$400 * .25 = $100 $400 - $100 = $300

$210 + $300 = $510


See, a lot more work!

30% of the coat = 0.3(300) = 90 dollars
Thus 30% off is 300 - 0.3(300) = 300 - 90 = 210 dollars

25% of the suit is 0.25(400) = 100 dollars
Thus 25% off is 400 - 0.25(400) = 400 -100 = 300 dollars

Joe spent 210 + 300 = 510 dollars

Cheers

30% discount MEANS you pay 70%

25 % discount MEANS You pay 75 %

70/100 X 300 = $210
75/100X 400 = $300

ADD = $ 510 ANSWER

The coat would be 90$ and the suit would be 100$.