method to remove zero digits from fraction in decimal

[Skaperen]

when a decimal number is a whole (integral, integer-like) number, it gets converted to string without the ".0". but if i take the result of calculation, such as conversion from Fahrenheit to Celsius, 98.6 gives me 37.0. but when the fraction part is zero, i want to make it like whole. basically i want to have a whole value if the fraction is zero. what decimal method can do this. i looked through the ones in the library manual but i could not find one. must i implement one (i'm sure i can, but this seem silly if there already is one).