x = total straws
Al = 1/2 x + 8 leaving 1/2 x - 8
Je = 1/2 ( 1/2x-8) + 8 = 1/4x +4 leaving 1/4 x - 12
La = 1/2 ( 1/4x -12 ) + 9 summed = x
1/2 x + 8 + 1/4x + 4 + 1/8 x +3 = x
7/8x + 15 = x
x = 120
Al = 68 leaving 52
Je = 34 leaving 18
La = 18 18 out of 120 = 15 % of the total