8:10 ($8 to $10).
1. You have the following information given in the problem above:
- Steve earns $8 per hour.
- His older brother earns $2 more per hour than Steve.
2. Then, the amount of money that his brother earns per hour:
3. Therefore, the ratio of the money Steve earns in an hour to the money of his brother earns in an hour, is $8 to $10.