Hopeful this is helpful!
Explanation:
a. p is 20% of 190. How many pennies do you have?
p=.20 x 190=p p= 38 pennies
b. 190 is 200% of r. How many rare coins do you have?
190/2=r r(rare coins) = 95 rare coins
c. n is 60% of r. How many nickels do you have?
n=.60 x 95=n n= 57 nickels
:)