-78.21% is the change from 670 to 146
Calculation steps:
[( 146 - 670 ) ÷ 670] x 100 = -78.21%
Formula
Percentage change = [(146 - 670) / 670] x 100
Subtract the new number by the original number
146 - 670 = -524
-524 ÷ 670 = -0.7820895522388059
-0.7820895522388059 x 100 = -78.21%