-45.22% is the change from 931 to 510
Calculation steps:
[( 510 - 931 ) ÷ 931] x 100 = -45.22%
Formula
Percentage change = [(510 - 931) / 931] x 100
Subtract the new number by the original number
510 - 931 = -421
-421 ÷ 931 = -0.4522019334049409
-0.4522019334049409 x 100 = -45.22%