-70.76% is the change from 831 to 243
Calculation steps:
[( 243 - 831 ) ÷ 831] x 100 = -70.76%
Formula
Percentage change = [(243 - 831) / 831] x 100
Subtract the new number by the original number
243 - 831 = -588
-588 ÷ 831 = -0.7075812274368231
-0.7075812274368231 x 100 = -70.76%