Answer:
63% (rounded)
Explanation:
First, you need to know how many marbles there are in total.
15 + 26 = 41
There are 41 marbles in total.
Out of 41 marbles, there are 26 violets. So you would divide 26 by 41.
26/41 = 0.63414634146...
Then you would round your number to 0.63.
The next step is to then change it to a percentage.
0.63 x 100 = 63
63% is your answer.