Answer:
ya the 15 sth like that I think
15.83
Explanation:
13.11 / 100 = 0.1311
0.1311*5=5%=0.6555
13.11+0.6555=13.7655
13.7655/100=0.137655 * 15 -->15%=2.064528
13.7655+2.064528=15.830325
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