Below is an instruction that describes a task. Write a response that appropriately completes the request in Thai. Please answer in Thai.

### Instruction:
On her birthday, Avianna bought red candles and blue candles in the ratio of 5:3. If Avianna had 45 red candles on her birthday, how many blue candles did she have?

### Response:
 เอเวียนนามีเทียบสีน้ำเงิน 5/3 * 45 = <<5/3*45=75>>75 เทียบ