-43.4% is the change from 901 to 510
Calculation steps:
[( 510 - 901 ) ÷ 901] x 100 = -43.4%
Formula
Percentage change = [(510 - 901) / 901] x 100
Subtract the new number by the original number
510 - 901 = -391
-391 ÷ 901 = -0.4339622641509434
-0.4339622641509434 x 100 = -43.4%