-5.99% is the change from 651 to 612
Calculation steps:
[( 612 - 651 ) ÷ 651] x 100 = -5.99%
Formula
Percentage change = [(612 - 651) / 651] x 100
Subtract the new number by the original number
612 - 651 = -39
-39 ÷ 651 = -0.059907834101382486
-0.059907834101382486 x 100 = -5.99%