-63.87% is the change from 155 to 56
Calculation steps:
[( 56 - 155 ) ÷ 155] x 100 = -63.87%
Formula
Percentage change = [(56 - 155) / 155] x 100
Subtract the new number by the original number
56 - 155 = -99
-99 ÷ 155 = -0.6387096774193548
-0.6387096774193548 x 100 = -63.87%