25% off means that they are paying 75% of the original price. Multiply d by 75%:
0.75d
Now you need to multiply the price by 1 plus the sales tax to get the total cost:
0.75d x 1.08
Simplify by multiplying 0.75 by 1.08 to get:
0.81d
72 + 74 is 146.
The angle sum of a triangle is 180.
180 - 146 is 34.
Its 2.59%. i mean i figured it out and i got 2.59%