-72.09% is the change from 817 to 228
Calculation steps:
[( 228 - 817 ) ÷ 817] x 100 = -72.09%
Formula
Percentage change = [(228 - 817) / 817] x 100
Subtract the new number by the original number
228 - 817 = -589
-589 ÷ 817 = -0.7209302325581395
-0.7209302325581395 x 100 = -72.09%