MATLAB: Round-off issue

round-off

I can't figure out why the floor wont come to 1752?
    >> 3.501/40*20*10^3+1.5
    ans =
        1.752000000000000e+003
    >> floor(ans)
    ans =
            1751

Best Answer

Rounding error caused by floating point calculation.
>> 3.501/40*20*10
ans =
17.504999999999995
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