January: 32
February: 28
The percent change is a percent decrease.
If there are 45 beads, with a ratio of

Then,

Then if

Then

Therefore,

Meaning, there would be a ratio of 36 beads to 9 beads
The original side length is given as 3.00
Multiply the original length by the scale factor:
3.00 x 0.75 = 2.25
The answer is B. 2.25 cm