-99.7% is the change from 675 to 2
Calculation steps:
[( 2 - 675 ) ÷ 675] x 100 = -99.7%
Formula
Percentage change = [(2 - 675) / 675] x 100
Subtract the new number by the original number
2 - 675 = -673
-673 ÷ 675 = -0.997037037037037
-0.997037037037037 x 100 = -99.7%