-69.45% is the change from 491 to 150
Calculation steps:
[( 150 - 491 ) ÷ 491] x 100 = -69.45%
Formula
Percentage change = [(150 - 491) / 491] x 100
Subtract the new number by the original number
150 - 491 = -341
-341 ÷ 491 = -0.6945010183299389
-0.6945010183299389 x 100 = -69.45%