-18.79% is the change from 644 to 523
Calculation steps:
[( 523 - 644 ) ÷ 644] x 100 = -18.79%
Formula
Percentage change = [(523 - 644) / 644] x 100
Subtract the new number by the original number
523 - 644 = -121
-121 ÷ 644 = -0.18788819875776397
-0.18788819875776397 x 100 = -18.79%