85% of 60 is what number?
36 is 45% of what?

60x85%=51
36x45%=16.3
Those are your answer.

. . . 1 . . .

Step 1: 60/x=100/85

Step 2: (60/x)*x=(100/85)*x       

Step 3: 60=1.17647058824*x      
 
Step 4: (1.17647058824) to get x

Step 5: 60/1.17647058824=x 

Step 6: 51=x 

The correct answer for the first one is x = 51.

. . . 2 . . .

Step 1: 45/x=100/35

Step 2: (45/x)*x=(100/35)*x      
 
Step 3: 45=2.85714285714*x  
    
Step 4: (2.85714285714) to get x

Step 5: 45/2.85714285714=x 

Step 6: 15.75=x 

Therefore, the second answer will be x = 15.75.

I hope I helped you! :)