-69.62% is the change from 678 to 206
Calculation steps:
[( 206 - 678 ) ÷ 678] x 100 = -69.62%
Formula
Percentage change = [(206 - 678) / 678] x 100
Subtract the new number by the original number
206 - 678 = -472
-472 ÷ 678 = -0.696165191740413
-0.696165191740413 x 100 = -69.62%