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 2 ℓ.
- Express 7000 mℓ as a percentage of 1 ℓ.
- Express 90 min as a percentage of 2 hours.
- Express 7 min as a percentage of 40 seconds.
(a)
1 ℓ = 1000 mℓ
2 ℓ = 2000 mℓ
8002000 x 100% = 40%
(b)
7000 mℓ = 7 ℓ
71 x 100% = 700%
(c)
1 h = 60 min
2 h = 120 min
90120 x 100% = 75%
(d)
1 min = 60 seconds
7 min = 420 seconds
42040 x 100% = 1050%
Answer(s): 40%, 700%, 75%, 1050%