-50.45% is the change from 674 to 334
Calculation steps:
[( 334 - 674 ) ÷ 674] x 100 = -50.45%
Formula
Percentage change = [(334 - 674) / 674] x 100
Subtract the new number by the original number
334 - 674 = -340
-340 ÷ 674 = -0.5044510385756676
-0.5044510385756676 x 100 = -50.45%