1. the relationship between two quantities expressed as the quotient of one divided by the other
Usage: mathematics
2. a fixed relationship in quantity, amount, or size between two or more things

Examples

• The ratio of boys to girls in the class is 3 to 2.
• Mix the paint in a ratio of two parts blue to one part white.
• The debt-to-income ratio is an important factor in loan approval.
• Teachers maintain a low student-to-teacher ratio for better learning.
• The recipe calls for a 1:4 ratio of sugar to flour.
• The company's profit ratio has improved this quarter.