-90.53% is the change from 676 to 64
Calculation steps:
[( 64 - 676 ) ÷ 676] x 100 = -90.53%
Formula
Percentage change = [(64 - 676) / 676] x 100
Subtract the new number by the original number
64 - 676 = -612
-612 ÷ 676 = -0.9053254437869822
-0.9053254437869822 x 100 = -90.53%