-68.21% is the change from 670 to 213
Calculation steps:
[( 213 - 670 ) ÷ 670] x 100 = -68.21%
Formula
Percentage change = [(213 - 670) / 670] x 100
Subtract the new number by the original number
213 - 670 = -457
-457 ÷ 670 = -0.682089552238806
-0.682089552238806 x 100 = -68.21%