-45.93% is the change from 945 to 511
Calculation steps:
[( 511 - 945 ) ÷ 945] x 100 = -45.93%
Formula
Percentage change = [(511 - 945) / 945] x 100
Subtract the new number by the original number
511 - 945 = -434
-434 ÷ 945 = -0.45925925925925926
-0.45925925925925926 x 100 = -45.93%