-47.7% is the change from 977 to 511
Calculation steps:
[( 511 - 977 ) ÷ 977] x 100 = -47.7%
Formula
Percentage change = [(511 - 977) / 977] x 100
Subtract the new number by the original number
511 - 977 = -466
-466 ÷ 977 = -0.47697031729785055
-0.47697031729785055 x 100 = -47.7%