The given binary number, 100011, can be converted to decimal by multiplying each digit by its corresponding power of 2 and then adding the results. In this case, starting from the rightmost digit, we have 1*2^0 + 1*2^1 + 0*2^2 + 0*2^3 + 0*2^4 + 1*2^5 = 1 + 2 + 0 + 0 + 0 + 32 = 35. Therefore, the decimal equivalent of the binary number 100011 is 35.