-71.2% is the change from 309 to 89
Calculation steps:
[( 89 - 309 ) ÷ 309] x 100 = -71.2%
Formula
Percentage change = [(89 - 309) / 309] x 100
Subtract the new number by the original number
89 - 309 = -220
-220 ÷ 309 = -0.7119741100323624
-0.7119741100323624 x 100 = -71.2%