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 6 ℓ.
- Express 900 mℓ as a percentage of 5 ℓ.
- Express 90 min as a percentage of 5 hours.
- Express 3 min as a percentage of 40 seconds.
(a)
1 ℓ = 1000 mℓ
6 ℓ = 6000 mℓ
3006000 x 100% = 5%
(b)
900 mℓ = 0.9 ℓ
0.95 x 100% = 18%
(c)
1 h = 60 min
5 h = 300 min
90300 x 100% = 30%
(d)
1 min = 60 seconds
3 min = 180 seconds
18040 x 100% = 450%
Answer(s): 5%, 18%, 30%, 450%