-64.75% is the change from 678 to 239
Calculation steps:
[( 239 - 678 ) ÷ 678] x 100 = -64.75%
Formula
Percentage change = [(239 - 678) / 678] x 100
Subtract the new number by the original number
239 - 678 = -439
-439 ÷ 678 = -0.6474926253687315
-0.6474926253687315 x 100 = -64.75%