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Transfer 1.1010111101 from binary in decimal number system

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let\'s translate to decimal like this:

1∙20+1∙2-1+0∙2-2+1∙2-3+0∙2-4+1∙2-5+1∙2-6+1∙2-7+1∙2-8+0∙2-9+1∙2-10 = 1∙1+1∙0.5+0∙0.25+1∙0.125+0∙0.0625+1∙0.03125+1∙0.015625+1∙0.0078125+1∙0.00390625+0∙0.001953125+1∙0.0009765625 = 1+0.5+0+0.125+0+0.03125+0.015625+0.0078125+0.00390625+0+0.0009765625 = 1.684570312510

got It: 1.10101111012 =1.684570312510