25/100 is equal to 25%.
Percents are always out of 100.
So 25/100 is 25%.
Hope this helped☺☺
        
             
        
        
        
so if 5.5 is in meter let change it to cm because the question want us to give the answer in cm. 


now we multiply 5.5 times 100 which is equal to 550. 
next we subtract 550 - 220= 330.
finally, the difference between a teacher and student is 330cm .meaning the teacher's desk is 330 cm longer or taller than the student.
 
        
             
        
        
        
You want to solve for 'z'.
First combine like terms on either side of the equal sign.
Left side:  9z +2  ----> No like terms, leave alone
Right side: 6z - 10 -z - 4  ----> circle like terms and add
                    6z -z = 5z
                   -10 -4 = -14
Now the equation is:
9z + 2 = 5z - 14
Get all the 'z' terms on the left side and all the numbers on right side.
You can move a term to the other side if you flip the sign.
Move 5z to left side, flip the sign to -5z
Move '2' to right side, flip the sign to -2
9z - 5z = -2 -14
Add like terms
4z = -16
Divide by 4 on both sides
z = -4