-62.1% is the change from 897 to 340
Calculation steps:
[( 340 - 897 ) ÷ 897] x 100 = -62.1%
Formula
Percentage change = [(340 - 897) / 897] x 100
Subtract the new number by the original number
340 - 897 = -557
-557 ÷ 897 = -0.620958751393534
-0.620958751393534 x 100 = -62.1%