-43.67% is the change from 909 to 512
Calculation steps:
[( 512 - 909 ) ÷ 909] x 100 = -43.67%
Formula
Percentage change = [(512 - 909) / 909] x 100
Subtract the new number by the original number
512 - 909 = -397
-397 ÷ 909 = -0.4367436743674367
-0.4367436743674367 x 100 = -43.67%