-51.23% is the change from 648 to 316
Calculation steps:
[( 316 - 648 ) ÷ 648] x 100 = -51.23%
Formula
Percentage change = [(316 - 648) / 648] x 100
Subtract the new number by the original number
316 - 648 = -332
-332 ÷ 648 = -0.5123456790123457
-0.5123456790123457 x 100 = -51.23%