-74.2% is the change from 314 to 81
Calculation steps:
[( 81 - 314 ) ÷ 314] x 100 = -74.2%
Formula
Percentage change = [(81 - 314) / 314] x 100
Subtract the new number by the original number
81 - 314 = -233
-233 ÷ 314 = -0.7420382165605095
-0.7420382165605095 x 100 = -74.2%