-64.38% is the change from 306 to 109
Calculation steps:
[( 109 - 306 ) ÷ 306] x 100 = -64.38%
Formula
Percentage change = [(109 - 306) / 306] x 100
Subtract the new number by the original number
109 - 306 = -197
-197 ÷ 306 = -0.6437908496732027
-0.6437908496732027 x 100 = -64.38%