-61.47% is the change from 340 to 131
Calculation steps:
[( 131 - 340 ) ÷ 340] x 100 = -61.47%
Formula
Percentage change = [(131 - 340) / 340] x 100
Subtract the new number by the original number
131 - 340 = -209
-209 ÷ 340 = -0.6147058823529412
-0.6147058823529412 x 100 = -61.47%