Divide 5 by 4. is your answer a rational number ? explain

Need to increase the numbers of customers i talk to daily by 20% how many customers do i need to talk to if i talk to a average of 8 customers per hour during an 8 hour shift

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

How do i take any fraction and make it into a decimal or percentage?