-71.22% is the change from 813 to 234
Calculation steps:
[( 234 - 813 ) ÷ 813] x 100 = -71.22%
Formula
Percentage change = [(234 - 813) / 813] x 100
Subtract the new number by the original number
234 - 813 = -579
-579 ÷ 813 = -0.7121771217712177
-0.7121771217712177 x 100 = -71.22%