-55.48% is the change from 620 to 276
Calculation steps:
[( 276 - 620 ) ÷ 620] x 100 = -55.48%
Formula
Percentage change = [(276 - 620) / 620] x 100
Subtract the new number by the original number
276 - 620 = -344
-344 ÷ 620 = -0.5548387096774193
-0.5548387096774193 x 100 = -55.48%