-60.24% is the change from 840 to 334
Calculation steps:
[( 334 - 840 ) ÷ 840] x 100 = -60.24%
Formula
Percentage change = [(334 - 840) / 840] x 100
Subtract the new number by the original number
334 - 840 = -506
-506 ÷ 840 = -0.6023809523809524
-0.6023809523809524 x 100 = -60.24%