-77.33% is the change from 666 to 151
Calculation steps:
[( 151 - 666 ) ÷ 666] x 100 = -77.33%
Formula
Percentage change = [(151 - 666) / 666] x 100
Subtract the new number by the original number
151 - 666 = -515
-515 ÷ 666 = -0.7732732732732732
-0.7732732732732732 x 100 = -77.33%