Question

Socket set for $36.00 with 40% off plus 8.25 % sales tax. How much do I owe?

Answer 1

36x0.4= 14.4
36-14.4=21.6
21.6×.0825= 1.782
21.6+1.782= 23.38

Answer 2

whatever% of anything is just (whatever/100) * anything.

so the socket set has a 40% off, what is 40% of 36?  well, is just (40/100) * 36, or 14.4, that's the discount, so the sale price is 36 - 14.4, or 21.6.

plus the 8.25% taxation, what is 8.25% of 21.6?  well, is just (8.25/100) * 21.6, or 1.782.

so the total price is 21.6 + 1.782, or 23.382, or about 23 bucks and 38 cents.