Getting 'N/D' to eval as a fraction not a decimal

[cyrille de brébisson]

Hello,

the subst solution is indeed the 'proper' one as it represents what you are really trying to acheive, replace N and D in the N/D expression by their values. Even if the syntax can look strange and confusing...

The string solution EXPR(N+"/"+D) is much less confusing, but most likely slower...

All the approaches using the CAS will be slower..

Cyrille