-97.24% is the change from 651 to 18
Calculation steps:
[( 18 - 651 ) ÷ 651] x 100 = -97.24%
Formula
Percentage change = [(18 - 651) / 651] x 100
Subtract the new number by the original number
18 - 651 = -633
-633 ÷ 651 = -0.9723502304147466
-0.9723502304147466 x 100 = -97.24%