Question

At the craft store, Ken bought a bag of yellow and orange marbles. He received 90 marbles in all. 81 of the marbles were yellow. What percentage of the marbles were yellow

Answer 1

To calculate the percentage of yellow marbles Ken received, divide 81 yellow marbles by the total of 90 marbles and multiply by 100, resulting in 90% yellow marbles.

Step-by-step explanation:

The question is asking to find what percentage of the marbles Ken bought were yellow. Ken received 90 marbles in total, and 81 of those marbles were yellow.

To find the percentage of yellow marbles, we divide the number of yellow marbles by the total number of marbles and then multiply by 100.

So the calculation we need to do is:
(Number of yellow marbles ÷ Total number of marbles) × 100 = (81 ÷ 90) × 100.

Perform the division first:
81 ÷ 90 = 0.9.

Then multiply by 100 to get the percentage:
0.9 × 100 = 90%.

Therefore, 90% of the marbles Ken received were yellow.