-30.6% is the change from 951 to 660
Calculation steps:
[( 660 - 951 ) ÷ 951] x 100 = -30.6%
Formula
Percentage change = [(660 - 951) / 951] x 100
Subtract the new number by the original number
660 - 951 = -291
-291 ÷ 951 = -0.305993690851735
-0.305993690851735 x 100 = -30.6%