Find the following values without a calculator.
Give your answers in this manner. (Eg 10%, 20%, 30%, 40%)
- Express 600 mℓ as a percentage of 4 ℓ.
- Express 1000 mℓ as a percentage of 5 ℓ.
- Express 60 min as a percentage of 2 hours.
- Express 7 min as a percentage of 30 seconds.
(a)
1 ℓ = 1000 mℓ
4 ℓ = 4000 mℓ
6004000 x 100% = 15%
(b)
1000 mℓ = 1 ℓ
15 x 100% = 20%
(c)
1 h = 60 min
2 h = 120 min
60120 x 100% = 50%
(d)
1 min = 60 seconds
7 min = 420 seconds
42030 x 100% = 1400%
Answer(s): 15%, 20%, 50%, 1400%