-69.8% is the change from 510 to 154
Calculation steps:
[( 154 - 510 ) ÷ 510] x 100 = -69.8%
Formula
Percentage change = [(154 - 510) / 510] x 100
Subtract the new number by the original number
154 - 510 = -356
-356 ÷ 510 = -0.6980392156862745
-0.6980392156862745 x 100 = -69.8%