-68.1% is the change from 840 to 268
Calculation steps:
[( 268 - 840 ) ÷ 840] x 100 = -68.1%
Formula
Percentage change = [(268 - 840) / 840] x 100
Subtract the new number by the original number
268 - 840 = -572
-572 ÷ 840 = -0.680952380952381
-0.680952380952381 x 100 = -68.1%