Respuesta :

Answer:

Step-by-step explanation:

its 10

Answer:

10%

Step-by-step explanation:

Let x be the percentage

[tex]\frac{x}{100} *40= \frac{1}{100} *400\\\frac{x}{10} * 4=4\\ x=10*\frac{4}{4} \\x=10[/tex]

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