-64.76% is the change from 647 to 228
Calculation steps:
[( 228 - 647 ) ÷ 647] x 100 = -64.76%
Formula
Percentage change = [(228 - 647) / 647] x 100
Subtract the new number by the original number
228 - 647 = -419
-419 ÷ 647 = -0.6476043276661515
-0.6476043276661515 x 100 = -64.76%