A friend gave me this cutting a few months ago. The leaves are starting to turn brown and fall off! I wait until the soil is dry before I water it and it sits in a fairly sunny spot. Am I watering it too much or not enough??

The soil surface of your Chinese Money Plant (Pilea peperomioides) looks to be a little dry so I wonder how moist it is at root level. I also wonder if your plant might be receiving too much sun; this Pilea prefers partial to dappled shade. In their native habitat they grow on damp rocks in forests.

Not enough by the looks of the soil in the container. .When the soil in the container has a light color, it can be used to tell if you need to water. When the soil has a dark color that means the soil is wet. Another method is to allow the top inch of the soil to dry before watering, Last, when the pot is heavy don't water and when its light water.

Does that pot have a drain hole?

How far down does the soil get dry before you water? How much water do you then give it?