-87.9% is the change from 157 to 19
Calculation steps:
[( 19 - 157 ) ÷ 157] x 100 = -87.9%
Formula
Percentage change = [(19 - 157) / 157] x 100
Subtract the new number by the original number
19 - 157 = -138
-138 ÷ 157 = -0.8789808917197452
-0.8789808917197452 x 100 = -87.9%