-75.44% is the change from 631 to 155
Calculation steps:
[( 155 - 631 ) ÷ 631] x 100 = -75.44%
Formula
Percentage change = [(155 - 631) / 631] x 100
Subtract the new number by the original number
155 - 631 = -476
-476 ÷ 631 = -0.7543581616481775
-0.7543581616481775 x 100 = -75.44%