Find the following values without a calculator.
Give your answers in this manner. (Eg 10%, 20%, 30%, 40%)
- Express 100 mℓ as a percentage of 2 ℓ.
- Express 7000 mℓ as a percentage of 4 ℓ.
- Express 30 min as a percentage of 2 hours.
- Express 3 min as a percentage of 90 seconds.
(a)
1 ℓ = 1000 mℓ
2 ℓ = 2000 mℓ
1002000 x 100% = 5%
(b)
7000 mℓ = 7 ℓ
74 x 100% = 175%
(c)
1 h = 60 min
2 h = 120 min
30120 x 100% = 25%
(d)
1 min = 60 seconds
3 min = 180 seconds
18090 x 100% = 200%
Answer(s): 5%, 175%, 25%, 200%