-38.23% is the change from 497 to 307
Calculation steps:
[( 307 - 497 ) ÷ 497] x 100 = -38.23%
Formula
Percentage change = [(307 - 497) / 497] x 100
Subtract the new number by the original number
307 - 497 = -190
-190 ÷ 497 = -0.3822937625754527
-0.3822937625754527 x 100 = -38.23%