-49.68% is the change from 620 to 312
Calculation steps:
[( 312 - 620 ) ÷ 620] x 100 = -49.68%
Formula
Percentage change = [(312 - 620) / 620] x 100
Subtract the new number by the original number
312 - 620 = -308
-308 ÷ 620 = -0.4967741935483871
-0.4967741935483871 x 100 = -49.68%