Find the following values without a calculator.
Give your answers in this manner. (Eg 10%, 20%, 30%, 40%)
- Express 300 mℓ as a percentage of 3 ℓ.
- Express 3000 mℓ as a percentage of 4 ℓ.
- Express 90 min as a percentage of 5 hours.
- Express 7 min as a percentage of 40 seconds.
(a)
1 ℓ = 1000 mℓ
3 ℓ = 3000 mℓ
3003000 x 100% = 10%
(b)
3000 mℓ = 3 ℓ
34 x 100% = 75%
(c)
1 h = 60 min
5 h = 300 min
90300 x 100% = 30%
(d)
1 min = 60 seconds
7 min = 420 seconds
42040 x 100% = 1050%
Answer(s): 10%, 75%, 30%, 1050%