-93.49% is the change from 307 to 20
Calculation steps:
[( 20 - 307 ) ÷ 307] x 100 = -93.49%
Formula
Percentage change = [(20 - 307) / 307] x 100
Subtract the new number by the original number
20 - 307 = -287
-287 ÷ 307 = -0.9348534201954397
-0.9348534201954397 x 100 = -93.49%