-30.68% is the change from 929 to 644
Calculation steps:
[( 644 - 929 ) ÷ 929] x 100 = -30.68%
Formula
Percentage change = [(644 - 929) / 929] x 100
Subtract the new number by the original number
644 - 929 = -285
-285 ÷ 929 = -0.3067814854682454
-0.3067814854682454 x 100 = -30.68%