-38% is the change from 350 to 217
Calculation steps:
[( 217 - 350 ) ÷ 350] x 100 = -38%
Formula
Percentage change = [(217 - 350) / 350] x 100
Subtract the new number by the original number
217 - 350 = -133
-133 ÷ 350 = -0.38
-0.38 x 100 = -38%
Example