ANSWER
0.12
EXPLAINATION:
turn 4 into a fraction ( 4/1 )
divide 12/25
since you cant divide fractions, you use KCF (keep change flip)
keep 12/25 changed division to multlication and flip 4/1 to 1/4
now multiply 12/25 x 1/4
Your answer is 0.12
Hope this helps!!