4:5

4:5 is a ratio (two quantities in the 4-to-5 proportion).

Quick conversions:

• Fraction: 4/5
• Decimal: 0.8
• Percentage: 80%

If you have a total or want to split something in this ratio:

• The two parts are 4/9 of the total and 5/9 of the total.
• Example: If the total is 90, the parts are (4/9)*90 = 40 and (5/9)*90 = 50.

Practice problems:

• If a:b = 4:5 and a + b = 90, find a and b. (Answer: a = 40, b = 50)
• If a:b = 4:5 and a = 32, what is b? (Answer: b = 40)
• If the total is T, the parts are 4T/9 and 5T/9.

Would you like to work on a specific ratio problem, or convert a particular value using 4:5?