-46.72% is the change from 991 to 528
Calculation steps:
[( 528 - 991 ) ÷ 991] x 100 = -46.72%
Formula
Percentage change = [(528 - 991) / 991] x 100
Subtract the new number by the original number
528 - 991 = -463
-463 ÷ 991 = -0.467204843592331
-0.467204843592331 x 100 = -46.72%