-65.31% is the change from 980 to 340
Calculation steps:
[( 340 - 980 ) ÷ 980] x 100 = -65.31%
Formula
Percentage change = [(340 - 980) / 980] x 100
Subtract the new number by the original number
340 - 980 = -640
-640 ÷ 980 = -0.6530612244897959
-0.6530612244897959 x 100 = -65.31%