Natalie has a total of 40 marbles.
If 4 of Paiges' marbles are green, then we would write this as the ratio
4:16, or 1:4
This means that for every green marble she has, she has 4 total marbles
Therefore, if Natalie has 10 green marbles, we would multiply this by 4 to get a total of 40 marbles.