-98.1% is the change from 633 to 12
Calculation steps:
[( 12 - 633 ) ÷ 633] x 100 = -98.1%
Formula
Percentage change = [(12 - 633) / 633] x 100
Subtract the new number by the original number
12 - 633 = -621
-621 ÷ 633 = -0.981042654028436
-0.981042654028436 x 100 = -98.1%