fix next button url

Author: ProRasel

Check-Prime/Prime-Numbers.md

@@ -56,7 +56,7 @@ There are other solutions to this problem as well. We encourage you to google, 
 A prime number is only divisible by 1 and the number itself. 
 
  
-[![Next Page](assets/next-button.png)](..README.md)
+[![Next Page](../assets/next-button.png)](..README.md)
  
 
 ###### tags: `programmig-hero` `python` `float` `int` `math`

Computations/Calculate-Grades.md

@@ -38,7 +38,7 @@ Calculation of average is easy. Add them all and then divide by the count. As we
 After that, we are running a simple if-else to determine the grade. 
 
  
-[![Next Page](assets/next-button.png)](Gravitational-Force.md)
+[![Next Page](../assets/next-button.png)](Gravitational-Force.md)
  
 
 ###### tags: `programmig-hero` `python` `float` `int` `math`

Computations/Complex-Interest.md

@@ -40,7 +40,7 @@ To apply the same power on multiple things, put them inside parentheses and then
 
 
  
-[![Next Page](assets/next-button.png)](Calculate-Grades.md)
+[![Next Page](../assets/next-button.png)](Calculate-Grades.md)
  
 
 ###### tags: `programmig-hero` `python` `float` `int` `math`

Computations/Gravitational-Force.md

@@ -37,7 +37,7 @@ The calculation is simple. Only two things need to be learned from this.
 
 
  
-[![Next Page](assets/next-button.png)](Triangle-Area.md)
+[![Next Page](../assets/next-button.png)](Triangle-Area.md)
  
 
 ###### tags: `programmig-hero` `python` `float` `int` `math`

Computations/Simple-Interest.md

@@ -29,14 +29,9 @@ print("Simple interest is:", simple_interest)
 ### S-4: Explanation
 Read the code. I think you don’t need any extra explanation here. 
 
- 
-[![Next Page](assets/next-button.png)](Math-Power.md)
- 
-
-###### tags: `programmig-hero` `python` `float` `int` `math`
 
  
-[![Next Page](assets/next-button.png)](Complex-Interest.md)
+[![Next Page](../assets/next-button.png)](Complex-Interest.md)
  
 
 ###### tags: `programmig-hero` `python` `float` `int` `math`

Computations/Triangle-Area.md

@@ -61,7 +61,7 @@ The math module has a lot of math-related functionalities.
 
 
  
-[![Next Page](assets/next-button.png)](..README.md)
+[![Next Page](../assets/next-button.png)](..README.md)
  
 
 ###### tags: `programmig-hero` `python` `float` `int` `math`