-71.01% is the change from 821 to 238
Calculation steps:
[( 238 - 821 ) ÷ 821] x 100 = -71.01%
Formula
Percentage change = [(238 - 821) / 821] x 100
Subtract the new number by the original number
238 - 821 = -583
-583 ÷ 821 = -0.7101096224116931
-0.7101096224116931 x 100 = -71.01%