A man spends 15% of his money and after spending 60% of the remainder he has 4080. Find the money he had at beginning?

Answer 1

after the first spending spree he has 0.85 M left
then he wanders into the horse track and spends 0.6 of that
so he has
0.85 M * 0.4 = 4080

M = 4080/(.4*.85)

= 12,000

Answer 2

100%-15%=85%
85 of60%=51%
85-51=34%
34%=4080
100%=12,000