-31.78% is the change from 749 to 511
Calculation steps:
[( 511 - 749 ) ÷ 749] x 100 = -31.78%
Formula
Percentage change = [(511 - 749) / 749] x 100
Subtract the new number by the original number
511 - 749 = -238
-238 ÷ 749 = -0.3177570093457944
-0.3177570093457944 x 100 = -31.78%