2. Compute.

    1)  65 -st                2) 20 % 101-st            3)  4,8-st
        4 % 0,4 -st                  800-st                    150 % 200-st
        0,4  12-st                   1,2   60-st                  17 %   7,8-st

3. Find a number

       on 72                    75 % on 200
      0,8 on 64                  16 % on 48
 
       on 88                    32 % on 128

4. Find the change in per cents.

    from 45 to  120
    from 8 to 5