-68.06% is the change from 670 to 214
Calculation steps:
[( 214 - 670 ) ÷ 670] x 100 = -68.06%
Formula
Percentage change = [(214 - 670) / 670] x 100
Subtract the new number by the original number
214 - 670 = -456
-456 ÷ 670 = -0.6805970149253732
-0.6805970149253732 x 100 = -68.06%