-99.02% is the change from 307 to 3
Calculation steps:
[( 3 - 307 ) ÷ 307] x 100 = -99.02%
Formula
Percentage change = [(3 - 307) / 307] x 100
Subtract the new number by the original number
3 - 307 = -304
-304 ÷ 307 = -0.990228013029316
-0.990228013029316 x 100 = -99.02%