1.5 hours are "One hour and half" or "One and half hours"?
Examples:
He will be there in 1.5 hours.
I spend there 1.5 hours.
1.5 hours are "One hour and half" or "One and half hours"?
Examples:
He will be there in 1.5 hours.
I spend there 1.5 hours.
It's either "one and a half hours" (plural because it's more than one hour) or "one/an hour and a half".