Purchased at rates from/at rates ranging from

Question: Does it sound natural with or without "ranging from"? Or should it be omitted?
I’ve seen examples of sentences with the noun "price" and both variants – with/without "ranging from" – are possible, as far as I’ve seen.

Context: I want to explain to users that a certain number of projects have been ordered from freelancers within the range of, let’s say, $15 – $20 per hour. The sentence will be similar to the following: 30% of {tasks/projects} were ordered at rates from/ranging from $10 to $20 per hour.

I’m not sure whether I can find a grammatical rule to apply here, so asking native speakers to confirm which variant (with/without "ranging from" will sound natural to you).