A moment ago, there were a total of 1911 spectators at a tennis match. 293 of the male spectators and 488 of the female spectators left the stadium. Now there are four times as many male as female spectators left in the stadium. How many more male than female spectators are there in the stadium now?
Number of spectators left in the stadium
= 1911 - 293 - 488
= 1130

Number of female spectators in the end = 1 u
Number of male spectators in the end = 4 u
Total number of spectators in the end = 1 u + 4 u = 5 u

5 u = 1130
1 u = 1130 ÷ 5 = 226

Number of female spectators
= 1 u 
= 226

Number of male spectators
= 4 u
= 4 x 226
= 904

Number of male spectators more than the female spectators
= 904 - 226
= 678

Answer(s): 678