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 4 ℓ.
- Express 7000 mℓ as a percentage of 5 ℓ.
- Express 90 min as a percentage of 2 hours.
- Express 9 min as a percentage of 60 seconds.
(a)
1 ℓ = 1000 mℓ
4 ℓ = 4000 mℓ
4004000 x 100% = 10%
(b)
7000 mℓ = 7 ℓ
75 x 100% = 140%
(c)
1 h = 60 min
2 h = 120 min
90120 x 100% = 75%
(d)
1 min = 60 seconds
9 min = 540 seconds
54060 x 100% = 900%
Answer(s): 10%, 140%, 75%, 900%