one US dollar = 0.73 euros
One euro is worth more, because according to this rate if we exchange money from dollar to Euro, let we have 100 dollar.
multiplying both sides with 100 we get,
100 US dollar = 73 Euros
it means euro is worth more.
And to get how many dollars in one euro, for this divide both sides with 0.73,
1 US dollar / 0.73 = 0.73 euros / 0.73
1.37 approx. = 1 Euro
So, 1 euro have 1.37 dollars