Respuesta :

Answer:

45

Step-by-step explanation:

Answer:

45

Step-by-step explanation:

Let x be the number

90% of x = 40.5

[tex]\frac{90}{100}*x=40.5\\\\x=40.5*\frac{100}{90}\\\\x=\frac{405}{9}\\\\[/tex]

x = 45