-29.75% is the change from 242 to 170
Calculation steps:
[( 170 - 242 ) ÷ 242] x 100 = -29.75%
Formula
Percentage change = [(170 - 242) / 242] x 100
Subtract the new number by the original number
170 - 242 = -72
-72 ÷ 242 = -0.2975206611570248
-0.2975206611570248 x 100 = -29.75%