Question

How can you show that a 20% off coupon and a 10% off coupon is not the same as a 30% off coupon?

Answer 1

If applying the 20% off coupon and the 10% coupon it would be separate. This would be different than a 30% coupon

Explanation:

Let's say you are taking 20% off of $100, doing that would reduce the price to $80 because you took off $20, after this you would apply the 10% off coupon to the $80, your total would be 72 now because 10% of 80 is 8. The 20% Coupon and the 10% coupon stacked would bring your total to $72. If you flat out took 30% out of 100 dollars you would be left with $70 compared to the $72 that you got with the 20% coupon and the 10% coupon.

20% + 10% would remove less than a 30% coupon because after applying the 20% coupon, your 10% coupon would remove less because of the lower number being subtracted. Hope this helps

Answer 2

you would have to take 20% off a number, for example, 100, which would be 80. then you would take 10% off of that 80, and not the original 100. for the 30%, you would directly take 30% off of 100.

ex. 20% off coupon for 100 = 80
plus 10% off coupon for 80 = 72 dollars

30% off coupon for 100 = 70 dollars

different amounts!
hope this helps :)