let\'s translate to decimal like this:
1∙160+10∙16-1+11∙16-2+13∙16-3+15∙16-4 = 1∙1+10∙0.0625+11∙0.00390625+13∙0.000244140625+15∙1.52587890625E-5 = 1+0.625+0.04296875+0.003173828125+0.0002288818359375 = 1.6713714599609410
got It: 1.ABDF16 =1.6713714599609410