Free points please help

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

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

To decrease an amount by 16% what single multiplier would you use