Find the following values without a calculator.
Give your answers in this manner. (Eg 10%, 20%, 30%, 40%)
- Express 400 mℓ as a percentage of 5 ℓ.
- Express 3000 mℓ as a percentage of 5 ℓ.
- Express 90 min as a percentage of 2 hours.
- Express 5 min as a percentage of 20 seconds.
(a)
1 ℓ = 1000 mℓ
5 ℓ = 5000 mℓ
4005000 x 100% = 8%
(b)
3000 mℓ = 3 ℓ
35 x 100% = 60%
(c)
1 h = 60 min
2 h = 120 min
90120 x 100% = 75%
(d)
1 min = 60 seconds
5 min = 300 seconds
30020 x 100% = 1500%
Answer(s): 8%, 60%, 75%, 1500%