-39.47% is the change from 342 to 207
Calculation steps:
[( 207 - 342 ) ÷ 342] x 100 = -39.47%
Formula
Percentage change = [(207 - 342) / 342] x 100
Subtract the new number by the original number
207 - 342 = -135
-135 ÷ 342 = -0.39473684210526316
-0.39473684210526316 x 100 = -39.47%