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 4000 mℓ as a percentage of 8 ℓ.
- Express 90 min as a percentage of 3 hours.
- Express 2 min as a percentage of 40 seconds.
(a)
1 ℓ = 1000 mℓ
4 ℓ = 4000 mℓ
4004000 x 100% = 10%
(b)
4000 mℓ = 4 ℓ
48 x 100% = 50%
(c)
1 h = 60 min
3 h = 180 min
90180 x 100% = 50%
(d)
1 min = 60 seconds
2 min = 120 seconds
12040 x 100% = 300%
Answer(s): 10%, 50%, 50%, 300%