Why reading a decimal number correctly to write it as an equivalent fraction?

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?