Find the following values without a calculator.
Give your answers in this manner. (Eg 10%, 20%, 30%, 40%)
- Express 400 mℓ as a percentage of 2 ℓ.
- Express 3000 mℓ as a percentage of 3 ℓ.
- Express 90 min as a percentage of 6 hours.
- Express 7 min as a percentage of 50 seconds.
(a)
1 ℓ = 1000 mℓ
2 ℓ = 2000 mℓ
4002000 x 100% = 20%
(b)
3000 mℓ = 3 ℓ
33 x 100% = 100%
(c)
1 h = 60 min
6 h = 360 min
90360 x 100% = 25%
(d)
1 min = 60 seconds
7 min = 420 seconds
42050 x 100% = 840%
Answer(s): 20%, 100%, 25%, 840%