The teen club had a cupcake sale. They sold 2/3 of their cupcakes in the morning. They sold 1/6 of their cupcakes in the afternoon. They sold 200 cupcakes altogether. How many cupcakes were left to sell?

Can you include labeling when solving the steps?

2/3 + 1/6 = 5/6 sold

so
5/6 x = 200
so what is 1/6 x ?