-45.31% is the change from 768 to 420
Calculation steps:
[( 420 - 768 ) ÷ 768] x 100 = -45.31%
Formula
Percentage change = [(420 - 768) / 768] x 100
Subtract the new number by the original number
420 - 768 = -348
-348 ÷ 768 = -0.453125
-0.453125 x 100 = -45.31%