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 900 mℓ as a percentage of 3 ℓ.
- Express 30 min as a percentage of 2 hours.
- Express 4 min as a percentage of 60 seconds.
(a)
1 ℓ = 1000 mℓ
3 ℓ = 3000 mℓ
3003000 x 100% = 10%
(b)
900 mℓ = 0.9 ℓ
0.93 x 100% = 30%
(c)
1 h = 60 min
2 h = 120 min
30120 x 100% = 25%
(d)
1 min = 60 seconds
4 min = 240 seconds
24060 x 100% = 400%
Answer(s): 10%, 30%, 25%, 400%