-70.11% is the change from 813 to 243
Calculation steps:
[( 243 - 813 ) ÷ 813] x 100 = -70.11%
Formula
Percentage change = [(243 - 813) / 813] x 100
Subtract the new number by the original number
243 - 813 = -570
-570 ÷ 813 = -0.7011070110701108
-0.7011070110701108 x 100 = -70.11%