3) Multiply the price of the item ($40) by the percent of the sales tax (8%). Then add that to the price of the item to get the total.
=$40 * 8%
=40 * 0.08
=$3.20 tax
=$40 price of item + $3.20 tax
=$43.20 total
5) Multiply the number of students in the band last year (36) by the percentage increased (125%).
=36 * 125%
=36 * 1.25
=45
Hope this helps! :)