Find the following values without a calculator.
Give your answers in this manner. (Eg 10%, 20%, 30%, 40%)
- Express 800 mℓ as a percentage of 4 ℓ.
- Express 8000 mℓ as a percentage of 1 ℓ.
- Express 30 min as a percentage of 5 hours.
- Express 7 min as a percentage of 80 seconds.
(a)
1 ℓ = 1000 mℓ
4 ℓ = 4000 mℓ
8004000 x 100% = 20%
(b)
8000 mℓ = 8 ℓ
81 x 100% = 800%
(c)
1 h = 60 min
5 h = 300 min
30300 x 100% = 10%
(d)
1 min = 60 seconds
7 min = 420 seconds
42080 x 100% = 525%
Answer(s): 20%, 800%, 10%, 525%