-56.47% is the change from 340 to 148
Calculation steps:
[( 148 - 340 ) ÷ 340] x 100 = -56.47%
Formula
Percentage change = [(148 - 340) / 340] x 100
Subtract the new number by the original number
148 - 340 = -192
-192 ÷ 340 = -0.5647058823529412
-0.5647058823529412 x 100 = -56.47%