-73.1% is the change from 948 to 255
Calculation steps:
[( 255 - 948 ) ÷ 948] x 100 = -73.1%
Formula
Percentage change = [(255 - 948) / 948] x 100
Subtract the new number by the original number
255 - 948 = -693
-693 ÷ 948 = -0.7310126582278481
-0.7310126582278481 x 100 = -73.1%