-54.12% is the change from 170 to 78
Calculation steps:
[( 78 - 170 ) ÷ 170] x 100 = -54.12%
Formula
Percentage change = [(78 - 170) / 170] x 100
Subtract the new number by the original number
78 - 170 = -92
-92 ÷ 170 = -0.5411764705882353
-0.5411764705882353 x 100 = -54.12%