-54.78% is the change from 502 to 227
Calculation steps:
[( 227 - 502 ) ÷ 502] x 100 = -54.78%
Formula
Percentage change = [(227 - 502) / 502] x 100
Subtract the new number by the original number
227 - 502 = -275
-275 ÷ 502 = -0.547808764940239
-0.547808764940239 x 100 = -54.78%