-20.45% is the change from 264 to 210
Calculation steps:
[( 210 - 264 ) ÷ 264] x 100 = -20.45%
Formula
Percentage change = [(210 - 264) / 264] x 100
Subtract the new number by the original number
210 - 264 = -54
-54 ÷ 264 = -0.20454545454545456
-0.20454545454545456 x 100 = -20.45%