-63.2% is the change from 644 to 237
Calculation steps:
[( 237 - 644 ) ÷ 644] x 100 = -63.2%
Formula
Percentage change = [(237 - 644) / 644] x 100
Subtract the new number by the original number
237 - 644 = -407
-407 ÷ 644 = -0.6319875776397516
-0.6319875776397516 x 100 = -63.2%