Evaluate a-b/a if a =3 and b =-5

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

What else equals 42 and 30 for multiply

Ebert used to make $22 an hour, but got a 10% raise. how much more will he make in a 40 hour work week with raise?