-38.63% is the change from 497 to 305
Calculation steps:
[( 305 - 497 ) ÷ 497] x 100 = -38.63%
Formula
Percentage change = [(305 - 497) / 497] x 100
Subtract the new number by the original number
305 - 497 = -192
-192 ÷ 497 = -0.386317907444668
-0.386317907444668 x 100 = -38.63%