-43.98% is the change from 930 to 521
Calculation steps:
[( 521 - 930 ) ÷ 930] x 100 = -43.98%
Formula
Percentage change = [(521 - 930) / 930] x 100
Subtract the new number by the original number
521 - 930 = -409
-409 ÷ 930 = -0.4397849462365591
-0.4397849462365591 x 100 = -43.98%