-75.73% is the change from 309 to 75
Calculation steps:
[( 75 - 309 ) ÷ 309] x 100 = -75.73%
Formula
Percentage change = [(75 - 309) / 309] x 100
Subtract the new number by the original number
75 - 309 = -234
-234 ÷ 309 = -0.7572815533980582
-0.7572815533980582 x 100 = -75.73%