-91.88% is the change from 628 to 51
Calculation steps:
[( 51 - 628 ) ÷ 628] x 100 = -91.88%
Formula
Percentage change = [(51 - 628) / 628] x 100
Subtract the new number by the original number
51 - 628 = -577
-577 ÷ 628 = -0.9187898089171974
-0.9187898089171974 x 100 = -91.88%