-38% is the change from 679 to 421
Calculation steps:
[( 421 - 679 ) ÷ 679] x 100 = -38%
Formula
Percentage change = [(421 - 679) / 679] x 100
Subtract the new number by the original number
421 - 679 = -258
-258 ÷ 679 = -0.3799705449189985
-0.3799705449189985 x 100 = -38%