Sure, let's break down the problem step-by-step:
1. Identify the quantities:
- Gallons of flat paint sold: 33 gallons
- Gallons of high-gloss paint sold: 57 gallons
2. Calculate the total gallons of paint sold:
- Total gallons = gallons of flat paint + gallons of high-gloss paint
- Total gallons = 33 + 57
- Total gallons = 90
3. Determine the ratio of high-gloss gallons sold to the total gallons sold:
- The ratio we are looking for is the number of gallons of high-gloss paint sold to the total number of gallons sold.
- The ratio is therefore 57 (high-gloss) to 90 (total).
4. Express the ratio in simplest form for clarity:
- The answer is already in its simplest form as 57:90.
Thus, the ratio of gallons of high-gloss paint sold to the total gallons sold is [tex]\( \boxed{57:90} \)[/tex], which corresponds to option D.