MATLAB: Symsum returning a large fraction

summationsymbolicsymsum

I am using the symsum command to obtain a value for the summation of a series. My specific code is
syms g
SUM = symsum(.9^g,g,0,20);
The answer given to me by matlab is 890581010868487640791/100000000000000000000. I can't seem to change the formatting of the value, any help is appreciated!

Best Answer

SUM may be of class sym, try
SUM=double(SUM)
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