-76.27% is the change from 670 to 159
Calculation steps:
[( 159 - 670 ) ÷ 670] x 100 = -76.27%
Formula
Percentage change = [(159 - 670) / 670] x 100
Subtract the new number by the original number
159 - 670 = -511
-511 ÷ 670 = -0.7626865671641792
-0.7626865671641792 x 100 = -76.27%