77.6% is the change from 558 to 991
Calculation steps:
[( 991 - 558 ) ÷ 558] x 100 = 77.6%
Formula
Percentage change = [(991 - 558) / 558] x 100
Subtract the new number by the original number
991 - 558 = 433
433 ÷ 558 = 0.7759856630824373
0.7759856630824373 x 100 = 77.6%