-64.5% is the change from 307 to 109
Calculation steps:
[( 109 - 307 ) ÷ 307] x 100 = -64.5%
Formula
Percentage change = [(109 - 307) / 307] x 100
Subtract the new number by the original number
109 - 307 = -198
-198 ÷ 307 = -0.6449511400651465
-0.6449511400651465 x 100 = -64.5%