-7.55% is the change from 662 to 612
Calculation steps:
[( 612 - 662 ) ÷ 662] x 100 = -7.55%
Formula
Percentage change = [(612 - 662) / 662] x 100
Subtract the new number by the original number
612 - 662 = -50
-50 ÷ 662 = -0.0755287009063444
-0.0755287009063444 x 100 = -7.55%