-44% is the change from 991 to 555
Calculation steps:
[( 555 - 991 ) ÷ 991] x 100 = -44%
Formula
Percentage change = [(555 - 991) / 991] x 100
Subtract the new number by the original number
555 - 991 = -436
-436 ÷ 991 = -0.4399596367305752
-0.4399596367305752 x 100 = -44%