A moment ago, there were a total of 1270 spectators at a badminton match. 311 of the female spectators and 524 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
= 1270 - 311 - 524
= 435

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 = 435
1 u = 435 ÷ 3 = 145

Number of male spectators
= 1 u 
= 145

Number of female spectators
= 2 u
= 2 x 145
= 290

Number of female spectators more than the male spectators
= 290 - 145
= 145

Answer(s): 145