-38.6% is the change from 342 to 210
Calculation steps:
[( 210 - 342 ) ÷ 342] x 100 = -38.6%
Formula
Percentage change = [(210 - 342) / 342] x 100
Subtract the new number by the original number
210 - 342 = -132
-132 ÷ 342 = -0.38596491228070173
-0.38596491228070173 x 100 = -38.6%