-22.55% is the change from 306 to 237
Calculation steps:
[( 237 - 306 ) ÷ 306] x 100 = -22.55%
Formula
Percentage change = [(237 - 306) / 306] x 100
Subtract the new number by the original number
237 - 306 = -69
-69 ÷ 306 = -0.22549019607843138
-0.22549019607843138 x 100 = -22.55%