Question

in a bag of marbles, 3/5 of the marbles are green and the rest are yellow. if the number of yellow marbles in doubled, and the number of green marbles remains the same, what fraction of the marbles will be yellow

Answer 1

If there are 3/5 green out of 5/5 you subtract to get 2/5 and then you double it to get 4/5

Answer 2

If 3/5 of your marbles are green and the rest are yellow then you would want to subtract your total which is 5/5 by 3/5, to find the total number of yellow marbles.

5/5-3/5=2/5

That means that 2/5 of your marbles are yellow.

You now want to double that number so 2/5+2/5=4/5.

The fraction of marbles that are yellow would be 4/5.

Hope this helps ;)