-65.3% is the change from 660 to 229
Calculation steps:
[( 229 - 660 ) ÷ 660] x 100 = -65.3%
Formula
Percentage change = [(229 - 660) / 660] x 100
Subtract the new number by the original number
229 - 660 = -431
-431 ÷ 660 = -0.6530303030303031
-0.6530303030303031 x 100 = -65.3%