Question

40% of marbles in a bag are black. if there are 20 marbles in the bag, how many are black

Answer 1

8

Explanation:

40% is also .4, or you could do 40 divided by 100. Which will get you 0.4, 100 multiplied by .4 is 40, so if you multiply 20 by .4 you should get 40% of 20. (8)