-30.98% is the change from 933 to 644
Calculation steps:
[( 644 - 933 ) ÷ 933] x 100 = -30.98%
Formula
Percentage change = [(644 - 933) / 933] x 100
Subtract the new number by the original number
644 - 933 = -289
-289 ÷ 933 = -0.3097534833869239
-0.3097534833869239 x 100 = -30.98%