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 5 ℓ.
- Express 7000 mℓ as a percentage of 5 ℓ.
- Express 60 min as a percentage of 5 hours.
- Express 7 min as a percentage of 20 seconds.
(a)
1 ℓ = 1000 mℓ
5 ℓ = 5000 mℓ
9005000 x 100% = 18%
(b)
7000 mℓ = 7 ℓ
75 x 100% = 140%
(c)
1 h = 60 min
5 h = 300 min
60300 x 100% = 20%
(d)
1 min = 60 seconds
7 min = 420 seconds
42020 x 100% = 2100%
Answer(s): 18%, 140%, 20%, 2100%