-21.51% is the change from 172 to 135
Calculation steps:
[( 135 - 172 ) ÷ 172] x 100 = -21.51%
Formula
Percentage change = [(135 - 172) / 172] x 100
Subtract the new number by the original number
135 - 172 = -37
-37 ÷ 172 = -0.21511627906976744
-0.21511627906976744 x 100 = -21.51%