(1/4) * (1/3) * (2/5) * x = 15 then x = 15 * 30 = 450
40% of 450 = 180
One fourth of one third of two fifth of a number is 15. What will be the 40% of that number is?

a: 120
b: 130
c: 150
d: 180
e: 250