-34.49% is the change from 983 to 644
Calculation steps:
[( 644 - 983 ) ÷ 983] x 100 = -34.49%
Formula
Percentage change = [(644 - 983) / 983] x 100
Subtract the new number by the original number
644 - 983 = -339
-339 ÷ 983 = -0.34486266531027465
-0.34486266531027465 x 100 = -34.49%