-1.85% is the change from 647 to 635
Calculation steps:
[( 635 - 647 ) ÷ 647] x 100 = -1.85%
Formula
Percentage change = [(635 - 647) / 647] x 100
Subtract the new number by the original number
635 - 647 = -12
-12 ÷ 647 = -0.01854714064914992
-0.01854714064914992 x 100 = -1.85%