4:5

Do you want me to interpret or manipulate the ratio 4:5? Here are the key facts and quick uses:

• As a fraction: 4:5 = 4/5.

• As a decimal: 4/5 = 0.8.

• As a percentage: 80%.

• If 4:5 is the ratio of two parts of a whole:

  • Total parts = 4 + 5 = 9.
  • The 4-part portion = 4/9 of the total.
  • The 5-part portion = 5/9 of the total.

• Example: If the total is 180 units, then:

  • 4-part share = (4/9) × 180 = 80
  • 5-part share = (5/9) × 180 = 100

• If you have A:B = 4:5 and A + B = T, then:

  • A = (4/9) × T
  • B = (5/9) × T

• Scaling: 4:5 is equivalent to 8:10, 12:15, etc. If you multiply both sides by k, you get 4k : 5k.

How would you like to apply this to a problem? If you have a specific exam question, share it and I’ll work through it.