There are 75 students in school band 45 students play woodwind instruments what percent of students play woodwinds

So here is what we know
75 students are in the band
45 play woodwinds
Now let me make an expression(I use this usually)
part/whole=%/100
So we know the part is 45 and the whole is 75, and we don't know the %
So let us substitute those values...
45/75=%/100
Lets simplify 45/75
45/75 divided by 15/15= 3/5
So lets get back to our expression
3/5=%/100
5 x 20 is 100 so 3 x 20 is 60 
So 60% of the students is the correct answer