20 plus 15 percent = 23
4.43 plus 15 percent is 5.0945
(15%) + (10%) = 0.25
23 percent plus 15 percent is 38 percent. However, this only works if the percents are of the same thing.
1,779.00 + 15% = 2,045.85
14.00 + (15%) = 16.10
15 + 40% = 21
25 + (15%) = 28.75
138.00 + (15%) = 158.70
184
1926.25
517.5