-82.5% is the change from 657 to 115
Calculation steps:
[( 115 - 657 ) ÷ 657] x 100 = -82.5%
Formula
Percentage change = [(115 - 657) / 657] x 100
Subtract the new number by the original number
115 - 657 = -542
-542 ÷ 657 = -0.8249619482496194
-0.8249619482496194 x 100 = -82.5%