-80.19% is the change from 308 to 61
Calculation steps:
[( 61 - 308 ) ÷ 308] x 100 = -80.19%
Formula
Percentage change = [(61 - 308) / 308] x 100
Subtract the new number by the original number
61 - 308 = -247
-247 ÷ 308 = -0.801948051948052
-0.801948051948052 x 100 = -80.19%