-30.59% is the change from 510 to 354
Calculation steps:
[( 354 - 510 ) ÷ 510] x 100 = -30.59%
Formula
Percentage change = [(354 - 510) / 510] x 100
Subtract the new number by the original number
354 - 510 = -156
-156 ÷ 510 = -0.3058823529411765
-0.3058823529411765 x 100 = -30.59%