Find the following values without a calculator.
Give your answers in this manner. (Eg 10%, 20%, 30%, 40%)
- Express 800 mℓ as a percentage of 4 ℓ.
- Express 8000 mℓ as a percentage of 2 ℓ.
- Express 90 min as a percentage of 5 hours.
- Express 3 min as a percentage of 90 seconds.
(a)
1 ℓ = 1000 mℓ
4 ℓ = 4000 mℓ
8004000 x 100% = 20%
(b)
8000 mℓ = 8 ℓ
82 x 100% = 400%
(c)
1 h = 60 min
5 h = 300 min
90300 x 100% = 30%
(d)
1 min = 60 seconds
3 min = 180 seconds
18090 x 100% = 200%
Answer(s): 20%, 400%, 30%, 200%