Checking algebra answer, Is it correct?

Question

320km/1hr
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320km /1hr →1m/1.609km =320m/1.609hr÷=199.3mph
Answer: Round to nearest 10th =198.9mph

Answer 1

The notation is confusing. To make things more explicit, I'd have written

320km/1hr * 1mi/1.609km = 320/1.609 mi/hr = 198.9 mi/hr

That way you can see which units cancel.

Using m for mile (from the mph) is confusing.