-53.92% is the change from 510 to 235
Calculation steps:
[( 235 - 510 ) ÷ 510] x 100 = -53.92%
Formula
Percentage change = [(235 - 510) / 510] x 100
Subtract the new number by the original number
235 - 510 = -275
-275 ÷ 510 = -0.5392156862745098
-0.5392156862745098 x 100 = -53.92%