An investment of P60,800 increases to a P83,200, if invested at 18% compounded monthly, find the tern of the investment.
The equation you will need is
FV = PV (1+i)n
FV = future value (83200)
PV = present (or starting value)
i = periodic interest in decimal form . The periods are 1 month 18% / 12months = 1.5% per period = .015
n = mumber of periods (months) <===== this is what you are looking for in the Q
Try it to see what YOU can compute.....