-64.6% is the change from 644 to 228
Calculation steps:
[( 228 - 644 ) ÷ 644] x 100 = -64.6%
Formula
Percentage change = [(228 - 644) / 644] x 100
Subtract the new number by the original number
228 - 644 = -416
-416 ÷ 644 = -0.6459627329192547
-0.6459627329192547 x 100 = -64.6%