This is 3 question help please

Abag of jelly beans contain 13 pink, green, 20 yellow, 10 black, 7 red, and 11 orange jelly beans. approximately what percent of the jelly beans are pink and yellow?

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

Percent increase and decrease. original number: 45 new number: 18