-34.21% is the change from 342 to 225
Calculation steps:
[( 225 - 342 ) ÷ 342] x 100 = -34.21%
Formula
Percentage change = [(225 - 342) / 342] x 100
Subtract the new number by the original number
225 - 342 = -117
-117 ÷ 342 = -0.34210526315789475
-0.34210526315789475 x 100 = -34.21%