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 5 ℓ.
- Express 4000 mℓ as a percentage of 2 ℓ.
- Express 90 min as a percentage of 2 hours.
- Express 7 min as a percentage of 10 seconds.
(a)
1 ℓ = 1000 mℓ
5 ℓ = 5000 mℓ
1005000 x 100% = 2%
(b)
4000 mℓ = 4 ℓ
42 x 100% = 200%
(c)
1 h = 60 min
2 h = 120 min
90120 x 100% = 75%
(d)
1 min = 60 seconds
7 min = 420 seconds
42010 x 100% = 4200%
Answer(s): 2%, 200%, 75%, 4200%