Answer this and put it in simplest form

6(51/4) - 4(37/6) = 306/24 - 148/25 = 158/24

The first thing you need to do is give common denominators. 

you need to find a number that the denominators have in common.

in this case it would be 12 because 4 and 6 can both go into 12 

what you do to the bottom you must also do to the top.

4 *3 = 12 so you need to multiply the top by 3 as well. 3*3= 9

6*2=12 so you need to multiply the top by 2 as well 1*2=2

now we have 12 9/12 -  6 2/12

now you subtract across, 9-2= 7 and you leave the denominator the same.

12-6=6

final answer is 6 7/12

you are not able to simplify it any further 

He will need 2,898 pieces of paper