103.07% is the change from 488 to 991
Calculation steps:
[( 991 - 488 ) ÷ 488] x 100 = 103.07%
Formula
Percentage change = [(991 - 488) / 488] x 100
Subtract the new number by the original number
991 - 488 = 503
503 ÷ 488 = 1.0307377049180328
1.0307377049180328 x 100 = 103.07%