Can some one help me, I'm trying to find the percentage increase between

0.69
$1.55
$2.60
$4.23
$5.39

.69 x = 1.55

x = 2.246
2.246 - 1 = 1.246 increase fraction
times 100 =
124.6 % = percent increase

In other words
.69 is increased by 1.246(.69)
=.69 + .86
=1.55