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 5000 mℓ as a percentage of 2 ℓ.
- Express 30 min as a percentage of 2 hours.
- Express 4 min as a percentage of 20 seconds.
(a)
1 ℓ = 1000 mℓ
2 ℓ = 2000 mℓ
4002000 x 100% = 20%
(b)
5000 mℓ = 5 ℓ
52 x 100% = 250%
(c)
1 h = 60 min
2 h = 120 min
30120 x 100% = 25%
(d)
1 min = 60 seconds
4 min = 240 seconds
24020 x 100% = 1200%
Answer(s): 20%, 250%, 25%, 1200%