-1.96% is the change from 664 to 651
Calculation steps:
[( 651 - 664 ) ÷ 664] x 100 = -1.96%
Formula
Percentage change = [(651 - 664) / 664] x 100
Subtract the new number by the original number
651 - 664 = -13
-13 ÷ 664 = -0.01957831325301205
-0.01957831325301205 x 100 = -1.96%