-76.74% is the change from 645 to 150
Calculation steps:
[( 150 - 645 ) ÷ 645] x 100 = -76.74%
Formula
Percentage change = [(150 - 645) / 645] x 100
Subtract the new number by the original number
150 - 645 = -495
-495 ÷ 645 = -0.7674418604651163
-0.7674418604651163 x 100 = -76.74%