-68.29% is the change from 678 to 215
Calculation steps:
[( 215 - 678 ) ÷ 678] x 100 = -68.29%
Formula
Percentage change = [(215 - 678) / 678] x 100
Subtract the new number by the original number
215 - 678 = -463
-463 ÷ 678 = -0.6828908554572272
-0.6828908554572272 x 100 = -68.29%