A merchant had a batch of 120 face shields. If you sold 5/6 of the lot yesterday, how many protectors do you have to sell?

20 face shields.

Step-by-step explanation:

You have 120 face shields.

You sell 5/6 of them. That means that you still have to sell 1 - 5/6 = 1/6 of the lot.

120 * (1/6) = 20 * 1 = 20 face shields to sell.

Hope this helps!