Respuesta :

93.6

78*0.20=15.6
78+15.6=93.6

Answer:

65.

Step-by-step explanation:

Let x represent our required number.

We are asked to find the number which is equal to 78 when increased by 20 percent.

After increasing by 20%, our number would be [tex]x+\frac{20}{100}x=x+0.20x=1.20x[/tex].

To solve for x, we will set an equation as:

[tex]1.20x=78[/tex]

[tex]\frac{1.20x}{1.20}=\frac{78}{1.20}[/tex]

[tex]x=65[/tex]

Therefore, our required number is 65.

ACCESS MORE
EDU ACCESS
Universidad de Mexico