-44.04% is the change from 931 to 521
Calculation steps:
[( 521 - 931 ) ÷ 931] x 100 = -44.04%
Formula
Percentage change = [(521 - 931) / 931] x 100
Subtract the new number by the original number
521 - 931 = -410
-410 ÷ 931 = -0.44038668098818473
-0.44038668098818473 x 100 = -44.04%