-68.01% is the change from 647 to 207
Calculation steps:
[( 207 - 647 ) ÷ 647] x 100 = -68.01%
Formula
Percentage change = [(207 - 647) / 647] x 100
Subtract the new number by the original number
207 - 647 = -440
-440 ÷ 647 = -0.6800618238021638
-0.6800618238021638 x 100 = -68.01%