-83.99% is the change from 612 to 98
Calculation steps:
[( 98 - 612 ) ÷ 612] x 100 = -83.99%
Formula
Percentage change = [(98 - 612) / 612] x 100
Subtract the new number by the original number
98 - 612 = -514
-514 ÷ 612 = -0.8398692810457516
-0.8398692810457516 x 100 = -83.99%