84.2% is the change from 538 to 991
Calculation steps:
[( 991 - 538 ) ÷ 538] x 100 = 84.2%
Formula
Percentage change = [(991 - 538) / 538] x 100
Subtract the new number by the original number
991 - 538 = 453
453 ÷ 538 = 0.8420074349442379
0.8420074349442379 x 100 = 84.2%