To get the expected annual cash dividend payment, take the next expected quarterly dividend payment and multiply that by four. For example, if a Rs.100 stock is expected to pay a Rs 2.5 quarterly dividend next quarter, you just multiple by 4 and then divide this by Rs.100 to give a dividend yield of 10%.
Many online quote services will include dividend yield as one of the variables.
DIVIDEND YEILD=ANNUAL DIVIDEND /PRICE