-11.45% is the change from 620 to 549
Calculation steps:
[( 549 - 620 ) ÷ 620] x 100 = -11.45%
Formula
Percentage change = [(549 - 620) / 620] x 100
Subtract the new number by the original number
549 - 620 = -71
-71 ÷ 620 = -0.11451612903225807
-0.11451612903225807 x 100 = -11.45%