Respuesta :
The required number x is 600.
What is percent into number form?
In order to convert percent to a decimal number, the percentage should be divided by 100:
Let x be the missing number.
To find the number of 3.5% of it is 21 following all the steps given below.
Then,
The required number is;
[tex]\rm \dfrac{3.5}{100}\times x =21\\\\3.5x=21\times 100\\\\ 3.5x=2100\\\\x=\dfrac{2100}{3.5}\\\\x=600[/tex]
Hence, the required number x is 600.
To know more about Decimal click the link given below.
https://brainly.com/question/548650