A bag is full of marbles. 10 blue, 11 red, 3 green, 16 yellow. What percentage of marbles are yellow

100*(16/40) = ______%

To find the percentage of yellow marbles in the bag, you need to divide the number of yellow marbles by the total number of marbles in the bag, then multiply the result by 100.

First, add up the total number of marbles:
10 blue + 11 red + 3 green + 16 yellow = 40 marbles

Next, divide the number of yellow marbles by the total number of marbles:
16 yellow / 40 total = 0.4

Finally, multiply the result by 100 to find the percentage:
0.4 * 100 = 40%

Therefore, 40% of the marbles in the bag are yellow.