Find the following values without a calculator.
Give your answers in this manner. (Eg 10%, 20%, 30%, 40%)
- Express 900 mℓ as a percentage of 9 ℓ.
- Express 900 mℓ as a percentage of 2 ℓ.
- Express 90 min as a percentage of 5 hours.
- Express 7 min as a percentage of 60 seconds.
(a)
1 ℓ = 1000 mℓ
9 ℓ = 9000 mℓ
9009000 x 100% = 10%
(b)
900 mℓ = 0.9 ℓ
0.92 x 100% = 45%
(c)
1 h = 60 min
5 h = 300 min
90300 x 100% = 30%
(d)
1 min = 60 seconds
7 min = 420 seconds
42060 x 100% = 700%
Answer(s): 10%, 45%, 30%, 700%