-22.21% is the change from 797 to 620
Calculation steps:
[( 620 - 797 ) ÷ 797] x 100 = -22.21%
Formula
Percentage change = [(620 - 797) / 797] x 100
Subtract the new number by the original number
620 - 797 = -177
-177 ÷ 797 = -0.22208281053952322
-0.22208281053952322 x 100 = -22.21%