-58.23% is the change from 814 to 340
Calculation steps:
[( 340 - 814 ) ÷ 814] x 100 = -58.23%
Formula
Percentage change = [(340 - 814) / 814] x 100
Subtract the new number by the original number
340 - 814 = -474
-474 ÷ 814 = -0.5823095823095823
-0.5823095823095823 x 100 = -58.23%