-36.63% is the change from 991 to 628
Calculation steps:
[( 628 - 991 ) ÷ 991] x 100 = -36.63%
Formula
Percentage change = [(628 - 991) / 991] x 100
Subtract the new number by the original number
628 - 991 = -363
-363 ÷ 991 = -0.36629667003027244
-0.36629667003027244 x 100 = -36.63%