-60% is the change from 635 to 254
Calculation steps:
[( 254 - 635 ) ÷ 635] x 100 = -60%
Formula
Percentage change = [(254 - 635) / 635] x 100
Subtract the new number by the original number
254 - 635 = -381
-381 ÷ 635 = -0.6
-0.6 x 100 = -60%
Example