-7.61% is the change from 670 to 619
Calculation steps:
[( 619 - 670 ) ÷ 670] x 100 = -7.61%
Formula
Percentage change = [(619 - 670) / 670] x 100
Subtract the new number by the original number
619 - 670 = -51
-51 ÷ 670 = -0.07611940298507462
-0.07611940298507462 x 100 = -7.61%