By selling a watch for Rs.640/-, a man loses 20% what is that watch cost price
Choose the correct choice from the following answers
A) Rs. 700/- B) Rs. 800/- C) Rs. 880/- D) Rs. 900/- E) Rs. 990/-
80 % ------&gt; 640 (80 * 8 = 640)   100 % ------&gt;800 (100 * 8 = 800)   Cost price = Rs. 800/-   Rs. 800/-
<result>B</result>
By selling a watch for Rs.640/-, a man loses 20% what is that watch cost price