-45.23% is the change from 493 to 270
Calculation steps:
[( 270 - 493 ) ÷ 493] x 100 = -45.23%
Formula
Percentage change = [(270 - 493) / 493] x 100
Subtract the new number by the original number
270 - 493 = -223
-223 ÷ 493 = -0.45233265720081134
-0.45233265720081134 x 100 = -45.23%