-51.59% is the change from 690 to 334
Calculation steps:
[( 334 - 690 ) ÷ 690] x 100 = -51.59%
Formula
Percentage change = [(334 - 690) / 690] x 100
Subtract the new number by the original number
334 - 690 = -356
-356 ÷ 690 = -0.5159420289855072
-0.5159420289855072 x 100 = -51.59%