Question

30/[15-2{8-2-5}]-[5*3-9]

Answer 1

Step  1  : Simplify  $\frac{30}{13}$



Equation at the end of step  1  : $\frac{30}{13}$ -6





Step  2  :Rewriting the whole as an Equivalent Fraction :

 

2.1   Subtracting a whole from a fraction 

Rewrite the whole as a fraction using  13  as the denominator :

6= $\frac{6}{1}$ =$\frac{6*13}{13}$

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole 

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

 2.2    

   Adding up the two equivalent fractions 
Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

$\frac{30 - 6 * 13}{13}$ =  $\frac{48}{13}$



Final result :  $\frac{-48}{13}$= -3.69231