-68.41% is the change from 497 to 157
Calculation steps:
[( 157 - 497 ) ÷ 497] x 100 = -68.41%
Formula
Percentage change = [(157 - 497) / 497] x 100
Subtract the new number by the original number
157 - 497 = -340
-340 ÷ 497 = -0.6841046277665996
-0.6841046277665996 x 100 = -68.41%