If a target has a outer ring with a radius of 12 cm and a bullseye with a radius of 3 cm, what is the probability of hitting the bullseye?

Each morning papa notes the birds feeding on his bird feeder. so far this month he has see. 59 blue jays, 68 black crows, 12 red robin's and 1 cardinal. what is the probability of a blue jay being the next bird papa sees

Can someone me and do the problem plz so i can understand it more better

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.