-4.76% is the change from 651 to 620
Calculation steps:
[( 620 - 651 ) ÷ 651] x 100 = -4.76%
Formula
Percentage change = [(620 - 651) / 651] x 100
Subtract the new number by the original number
620 - 651 = -31
-31 ÷ 651 = -0.047619047619047616
-0.047619047619047616 x 100 = -4.76%