-69.24% is the change from 647 to 199
Calculation steps:
[( 199 - 647 ) ÷ 647] x 100 = -69.24%
Formula
Percentage change = [(199 - 647) / 647] x 100
Subtract the new number by the original number
199 - 647 = -448
-448 ÷ 647 = -0.6924265842349304
-0.6924265842349304 x 100 = -69.24%