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 2000 mℓ as a percentage of 8 ℓ.
- Express 30 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)
2000 mℓ = 2 ℓ
28 x 100% = 25%
(c)
1 h = 60 min
5 h = 300 min
30300 x 100% = 10%
(d)
1 min = 60 seconds
3 min = 180 seconds
18090 x 100% = 200%
Answer(s): 20%, 25%, 10%, 200%