20% is the change from 535 to 642
Calculation steps:
[( 642 - 535 ) ÷ 535] x 100 = 20%
Formula
Percentage change = [(642 - 535) / 535] x 100
Subtract the new number by the original number
642 - 535 = 107
107 ÷ 535 = 0.2
0.2 x 100 = 20%
Example