-31.32% is the change from 447 to 307
Calculation steps:
[( 307 - 447 ) ÷ 447] x 100 = -31.32%
Formula
Percentage change = [(307 - 447) / 447] x 100
Subtract the new number by the original number
307 - 447 = -140
-140 ÷ 447 = -0.3131991051454139
-0.3131991051454139 x 100 = -31.32%