-15.08% is the change from 975 to 828
Calculation steps:
[( 828 - 975 ) ÷ 975] x 100 = -15.08%
Formula
Percentage change = [(828 - 975) / 975] x 100
Subtract the new number by the original number
828 - 975 = -147
-147 ÷ 975 = -0.15076923076923077
-0.15076923076923077 x 100 = -15.08%