-94.57% is the change from 497 to 27
Calculation steps:
[( 27 - 497 ) ÷ 497] x 100 = -94.57%
Formula
Percentage change = [(27 - 497) / 497] x 100
Subtract the new number by the original number
27 - 497 = -470
-470 ÷ 497 = -0.9456740442655935
-0.9456740442655935 x 100 = -94.57%