77.92% is the change from 557 to 991
Calculation steps:
[( 991 - 557 ) ÷ 557] x 100 = 77.92%
Formula
Percentage change = [(991 - 557) / 557] x 100
Subtract the new number by the original number
991 - 557 = 434
434 ÷ 557 = 0.7791741472172352
0.7791741472172352 x 100 = 77.92%