-67.27% is the change from 55 to 18
Calculation steps:
[( 18 - 55 ) ÷ 55] x 100 = -67.27%
Formula
Percentage change = [(18 - 55) / 55] x 100
Subtract the new number by the original number
18 - 55 = -37
-37 ÷ 55 = -0.6727272727272727
-0.6727272727272727 x 100 = -67.27%