A. find 72% of a quantity if 11% of the quantity is 550 B. Express 9 hours as a percentage of one day.

C. In a school there are 800 students, 63% have black hair, 19% have brown hair and the remainder have fair hair Find:
A. the percentage of fair haired students

B. how many students have brown hair.

D. I bought a bicycle for $640 and sold it for a profit of 20%. Find the selling price of the bicyle

E. A greengrocer bought 200 kg of oranges for $180 and sold them for $1.14 per kilogram.
a. his profit
b. his percentage profit on the cost price.

F. Find the simple interest when €4500 is borowed for 3 years at 14% p. a.

PLEASE WITH EXPLANATION
HAS TO HAND IN TODAY​