-7.74% is the change from 672 to 620
Calculation steps:
[( 620 - 672 ) ÷ 672] x 100 = -7.74%
Formula
Percentage change = [(620 - 672) / 672] x 100
Subtract the new number by the original number
620 - 672 = -52
-52 ÷ 672 = -0.07738095238095238
-0.07738095238095238 x 100 = -7.74%