-98.38% is the change from 309 to 5
Calculation steps:
[( 5 - 309 ) ÷ 309] x 100 = -98.38%
Formula
Percentage change = [(5 - 309) / 309] x 100
Subtract the new number by the original number
5 - 309 = -304
-304 ÷ 309 = -0.9838187702265372
-0.9838187702265372 x 100 = -98.38%