-2.38% is the change from 631 to 616
Calculation steps:
[( 616 - 631 ) ÷ 631] x 100 = -2.38%
Formula
Percentage change = [(616 - 631) / 631] x 100
Subtract the new number by the original number
616 - 631 = -15
-15 ÷ 631 = -0.02377179080824089
-0.02377179080824089 x 100 = -2.38%