102.87% is the change from 488 to 990
Calculation steps:
[( 990 - 488 ) ÷ 488] x 100 = 102.87%
Formula
Percentage change = [(990 - 488) / 488] x 100
Subtract the new number by the original number
990 - 488 = 502
502 ÷ 488 = 1.028688524590164
1.028688524590164 x 100 = 102.87%