-85.46% is the change from 557 to 81
Calculation steps:
[( 81 - 557 ) ÷ 557] x 100 = -85.46%
Formula
Percentage change = [(81 - 557) / 557] x 100
Subtract the new number by the original number
81 - 557 = -476
-476 ÷ 557 = -0.8545780969479354
-0.8545780969479354 x 100 = -85.46%