-84.63% is the change from 670 to 103
Calculation steps:
[( 103 - 670 ) ÷ 670] x 100 = -84.63%
Formula
Percentage change = [(103 - 670) / 670] x 100
Subtract the new number by the original number
103 - 670 = -567
-567 ÷ 670 = -0.8462686567164179
-0.8462686567164179 x 100 = -84.63%