Question 606982
Let jake have $x

3x/8 on video tape

Balance left = x-3x/8 
=5x/8

He spent (1/2) *(5x/8) on cassette tape

=(5x/16)
So he had a balance of (5x/8)-(5x/16)
=5x/16

6.25 = 6 1/4 = 25/4

5x/16 = 25/4

 x= (16*25)/(4*5)

x= 20

He had $20