-54.78% is the change from 345 to 156
Calculation steps:
[( 156 - 345 ) ÷ 345] x 100 = -54.78%
Formula
Percentage change = [(156 - 345) / 345] x 100
Subtract the new number by the original number
156 - 345 = -189
-189 ÷ 345 = -0.5478260869565217
-0.5478260869565217 x 100 = -54.78%