-67.61% is the change from 670 to 217
Calculation steps:
[( 217 - 670 ) ÷ 670] x 100 = -67.61%
Formula
Percentage change = [(217 - 670) / 670] x 100
Subtract the new number by the original number
217 - 670 = -453
-453 ÷ 670 = -0.6761194029850747
-0.6761194029850747 x 100 = -67.61%