-75.09% is the change from 831 to 207
Calculation steps:
[( 207 - 831 ) ÷ 831] x 100 = -75.09%
Formula
Percentage change = [(207 - 831) / 831] x 100
Subtract the new number by the original number
207 - 831 = -624
-624 ÷ 831 = -0.7509025270758123
-0.7509025270758123 x 100 = -75.09%