-45.67% is the change from 497 to 270
Calculation steps:
[( 270 - 497 ) ÷ 497] x 100 = -45.67%
Formula
Percentage change = [(270 - 497) / 497] x 100
Subtract the new number by the original number
270 - 497 = -227
-227 ÷ 497 = -0.4567404426559356
-0.4567404426559356 x 100 = -45.67%