-38.78% is the change from 343 to 210
Calculation steps:
[( 210 - 343 ) ÷ 343] x 100 = -38.78%
Formula
Percentage change = [(210 - 343) / 343] x 100
Subtract the new number by the original number
210 - 343 = -133
-133 ÷ 343 = -0.3877551020408163
-0.3877551020408163 x 100 = -38.78%