-50.97% is the change from 620 to 304
Calculation steps:
[( 304 - 620 ) ÷ 620] x 100 = -50.97%
Formula
Percentage change = [(304 - 620) / 620] x 100
Subtract the new number by the original number
304 - 620 = -316
-316 ÷ 620 = -0.5096774193548387
-0.5096774193548387 x 100 = -50.97%