Question:

Is there a way I can use a data range when trying to find the frequency of a number?

The number ranges are:
larger or equal to 21% and smaller than 22%,
larger or equal to 22% and smaller than 23% and so forth.

Example, 21,24% is larger or equal to 21% and smaller than 22%.

How to calculate how often values (G2:G11) occur within each number range?

Answer:

Formula in I2:

=SUMPRODUCT(--(ROUNDDOWN(G2,2)=ROUNDDOWN($G$2:$G$11,2))) + ENTER

Functions in this article:

ROUNDDOWN(number, num_digits)
Rounds a number down to zero.

SUMPRODUCT(array1, array2, )
Returns the sum of the products of the corresponding ranges or arrays