Find the following values without a calculator.
Give your answers in this manner. (Eg 10%, 20%, 30%, 40%)
- Express 300 mℓ as a percentage of 5 ℓ.
- Express 900 mℓ as a percentage of 9 ℓ.
- Express 90 min as a percentage of 5 hours.
- Express 4 min as a percentage of 30 seconds.
(a)
1 ℓ = 1000 mℓ
5 ℓ = 5000 mℓ
3005000 x 100% = 6%
(b)
900 mℓ = 0.9 ℓ
0.99 x 100% = 10%
(c)
1 h = 60 min
5 h = 300 min
90300 x 100% = 30%
(d)
1 min = 60 seconds
4 min = 240 seconds
24030 x 100% = 800%
Answer(s): 6%, 10%, 30%, 800%