Solution - Power equations

Step  1  :

Equation at the end of step  1  :

Step  2  :

Equation at the end of step  2  :

Step  3  :

            73
 Simplify   ——
            75

Dividing exponents :

 3.1    7³   divided by   7⁵   = 7^{(3 - 5)} = 7^(-2) = ¹/_7²

Final result :

   1           
  —— = 0.02041 
  49