Does anyone know the answer to these in simplest form

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Aflower has 26 chromosomes. to create a new flower, how many would a sperm cell have what is called?

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv