-73.85% is the change from 975 to 255
Calculation steps:
[( 255 - 975 ) ÷ 975] x 100 = -73.85%
Formula
Percentage change = [(255 - 975) / 975] x 100
Subtract the new number by the original number
255 - 975 = -720
-720 ÷ 975 = -0.7384615384615385
-0.7384615384615385 x 100 = -73.85%