-78.24% is the change from 340 to 74
Calculation steps:
[( 74 - 340 ) ÷ 340] x 100 = -78.24%
Formula
Percentage change = [(74 - 340) / 340] x 100
Subtract the new number by the original number
74 - 340 = -266
-266 ÷ 340 = -0.7823529411764706
-0.7823529411764706 x 100 = -78.24%