-69.01% is the change from 668 to 207
Calculation steps:
[( 207 - 668 ) ÷ 668] x 100 = -69.01%
Formula
Percentage change = [(207 - 668) / 668] x 100
Subtract the new number by the original number
207 - 668 = -461
-461 ÷ 668 = -0.6901197604790419
-0.6901197604790419 x 100 = -69.01%