121.88% is the change from 64 to 142
Calculation steps:
[( 142 - 64 ) ÷ 64] x 100 = 121.88%
Formula
Percentage change = [(142 - 64) / 64] x 100
Subtract the new number by the original number
142 - 64 = 78
78 ÷ 64 = 1.21875
1.21875 x 100 = 121.88%
Example