Question

There are 75 marbles in a bin and 40% of the marbles are blue how many blue marbles are in the bin​

Answer 1

30 blue marbles

Explanation:

for things l;ike this where ite percentage is in the tens place I like finding what 10% is, I do this by dividing it by 10, so, 75/10=7.5. SO then you want to multiply that by four because 10% times 4 = 40% which is the equation you need so (this part isnt needed but its more visually descriptive)
`(10)/(7.5) *4=(40)/(30)`

Answer 2

30

Explanation:

You first need to find how many marbles of 75 are 40% which is found by multiplying 75 by .40 because you move 2 decimal places back in percentages. The answer is 30 blue marbles.