To find out the total price firstly we need to calculate how much is 7.5% from 22.50:
22.50 * 7.5% =
= 22.5 * 0.075 =
= 22 5/10 * 75/1000 =
= 22 1/2 * 15/200 =
= 45/2 * 3/40 =
= 9/2 * 3/8 =
= 27/16 =
= 1 11/16 =
= 1,6875 (done with calculator)
1,6875 after rounding to the nearest cent is 1,69
So the total price is 22.50 + 1.69 = $24.19