-61.65% is the change from 644 to 247
Calculation steps:
[( 247 - 644 ) ÷ 644] x 100 = -61.65%
Formula
Percentage change = [(247 - 644) / 644] x 100
Subtract the new number by the original number
247 - 644 = -397
-397 ÷ 644 = -0.6164596273291926
-0.6164596273291926 x 100 = -61.65%