Answer :

Let x be the the maximum marks 
First, you multiply x by 40%, and you get:
[tex] \frac{40}{100}x = 60[/tex]
[tex]0.4x = 60[/tex]

You move 0.4 to the other part. and since 0.4 was a multiplication, it become a division, so you get:
[tex]x = \frac{60}{0.4} [/tex]

you divide, and you get:
[tex]x = 150[/tex]

So, the full marks are 150 points. 

Hope this Helps! :)
ok so 40% is also 40/100 so take 40/100 and get 2.5. times that by 60 and you get 150.