-20.34% is the change from 644 to 513
Calculation steps:
[( 513 - 644 ) ÷ 644] x 100 = -20.34%
Formula
Percentage change = [(513 - 644) / 644] x 100
Subtract the new number by the original number
513 - 644 = -131
-131 ÷ 644 = -0.20341614906832298
-0.20341614906832298 x 100 = -20.34%