Metapost labeling question. Please help

[Curiouslearn <curiouslearn@gmail.com>]

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Hi,
I want the labels as (0.5,0.55,0.6,0.65,0.7,...,1)
or (0.50,0.55,0.60,0.65,0.70,...,1). Either of these two is fine.

I tried the following code for this.

\starttext

\startuseMPgraphic{labeltest}
numeric rmin,rmax;
rmin := 0.5; rmax := 1;
ux := 25cm; uy :=10cm;
% draw axes
draw (rmin,0)*ux -- (rmax+0.1,0)*ux;
draw (rmin,0)*ux -- (rmin*ux,(1.1)*uy);
for x = 0.5 step 0.05 until 1.1:
label.bot(textext(decimal(x)),(x*ux,x*uy));
endfor;
\stopuseMPgraphic

\useMPgraphic{labeltest}

\stoptext

I get (0.5,0.55, 0.6,0.65001,0.70001,0.75002,...,1.00003) instead. I don't
understand why I get more than 2 digits after 0.6. Is there a way to
restrict the number of digits after the decimal point.

Thanks very much.

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