Waiting for answer This question has not been answered yet. You can hire a professional tutor to get the answer.
39 is 5% of what number?
##39## is ##5%## of ##780##
To get from ##5%## to ##100%## we multiply by ##20##
##5%xx20=100%##
We use the same number we used with ##5% (20)## and multiply 39 with it
##39xx20=780##