-2.61% is the change from 651 to 634
Calculation steps:
[( 634 - 651 ) ÷ 651] x 100 = -2.61%
Formula
Percentage change = [(634 - 651) / 651] x 100
Subtract the new number by the original number
634 - 651 = -17
-17 ÷ 651 = -0.026113671274961597
-0.026113671274961597 x 100 = -2.61%