Answer: (a): 162 (b):
Step-by-step explanation: Since Mr.Siva had 54 cups sold which is 3/9 all we have to do is multiply 3/9 to the point where its a whole so 3/9 x 3 is 1, whatever we do with this fraction we do with the cups he sold, so 54 x 3 is 162. Since we know that he had a total of 162 cups, all we have to do is subtract how many cups he sold in the morning which was 54. So 162 - 54 is 108. Hope this help! :)