A moment ago, there were a total of 1398 spectators at a table tennis match. 367 of the female spectators and 497 of the male spectators left the stadium. Now there are twice as many female as male spectators left in the stadium. How many more female than male spectators are there in the stadium now?
Number of spectators left in the stadium
= 1398 - 367 - 497
= 534

Number of male spectators in the end = 1 u
Number of female spectators in the end = 2 u
Total number of spectators in the end = 1 u + 2 u = 3 u

3 u = 534
1 u = 534 ÷ 3 = 178

Number of male spectators
= 1 u 
= 178

Number of female spectators
= 2 u
= 2 x 178
= 356

Number of female spectators more than the male spectators
= 356 - 178
= 178

Answer(s): 178