I really need help with my question!

Subtract 8 1/6 - 4 5/6 . simplify the answer and write as a mixed number.

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number tt of tokens james has is a function of gg, the number of games he plays

What is the lcm of 16 and 40 ? 24 and 40 ?