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 2 ℓ.
- Express 4000 mℓ as a percentage of 2 ℓ.
- Express 90 min as a percentage of 2 hours.
- Express 5 min as a percentage of 10 seconds.
(a)
1 ℓ = 1000 mℓ
2 ℓ = 2000 mℓ
4002000 x 100% = 20%
(b)
4000 mℓ = 4 ℓ
42 x 100% = 200%
(c)
1 h = 60 min
2 h = 120 min
90120 x 100% = 75%
(d)
1 min = 60 seconds
5 min = 300 seconds
30010 x 100% = 3000%
Answer(s): 20%, 200%, 75%, 3000%