islam has updated basic join problems

Author: Islam-Imad

Basic Joins/05- Average Time of Process per Machine/README.md

@@ -39,7 +39,10 @@ Let's rephrase the problem statement to make our life easier.
 <br>
 For every <code>machine</code> evaluate the following 
 
-![equation](https://latex.codecogs.com/gif.latex?round%28%20%5Cfrac%7B%28timestamp_%7Bend%7D%29%20-%20sum%28timestamp_%7Bstart%7D%29%7D%7Bcount%28process%29%7D%20%2C%203%29)
+$$
+round( \frac{(timestamp_{end}) - sum(timestamp_{start})}{count(process)} , 3)
+$$
+
 <br>
 The easiest way is to solve this problem is to use aggregation functions.
 <br>

Basic Joins/09- Confirmation Rate/README.md

@@ -40,7 +40,9 @@ Let's rephrase the problem statement to make our life easier.
 <br>
 for each user divide the number of confirmed message with the total requested messages.
 
-![equation](https://latex.codecogs.com/gif.latex?round%28%5Cfrac%7Bcount%28confirmed_messages%29%7D%7Bcount%28messages%29%7D%20%2C%202%29)
+$$
+  round(\frac{count(confirmed_messages)}{count(messages)} , 2)
+$$
 <br>
 First, count the total requested messages for each user. we can use <code>COUNT()</code> function to evaluate this easily.
 <br>