-53.82% is the change from 340 to 157
Calculation steps:
[( 157 - 340 ) ÷ 340] x 100 = -53.82%
Formula
Percentage change = [(157 - 340) / 340] x 100
Subtract the new number by the original number
157 - 340 = -183
-183 ÷ 340 = -0.538235294117647
-0.538235294117647 x 100 = -53.82%