-12.1% is the change from 620 to 545
Calculation steps:
[( 545 - 620 ) ÷ 620] x 100 = -12.1%
Formula
Percentage change = [(545 - 620) / 620] x 100
Subtract the new number by the original number
545 - 620 = -75
-75 ÷ 620 = -0.12096774193548387
-0.12096774193548387 x 100 = -12.1%