Sagot :
The ratio is 12:40 or 12/40 but if in fraction form you cannot read it as fraction but read as ratio 12/40 is read as "12 is to 40". In simplest form 12:40 is 3:10
12:40 if you'll read it you will say 12 is to 40 the colon is read as is to in lowest term 3:10