-69.85% is the change from 660 to 199
Calculation steps:
[( 199 - 660 ) ÷ 660] x 100 = -69.85%
Formula
Percentage change = [(199 - 660) / 660] x 100
Subtract the new number by the original number
199 - 660 = -461
-461 ÷ 660 = -0.6984848484848485
-0.6984848484848485 x 100 = -69.85%