Find the following values without a calculator.
Give your answers in this manner. (Eg 10%, 20%, 30%, 40%)
- Express 100 mℓ as a percentage of 2 ℓ.
- Express 8000 mℓ as a percentage of 2 ℓ.
- Express 90 min as a percentage of 3 hours.
- Express 7 min as a percentage of 80 seconds.
(a)
1 ℓ = 1000 mℓ
2 ℓ = 2000 mℓ
1002000 x 100% = 5%
(b)
8000 mℓ = 8 ℓ
82 x 100% = 400%
(c)
1 h = 60 min
3 h = 180 min
90180 x 100% = 50%
(d)
1 min = 60 seconds
7 min = 420 seconds
42080 x 100% = 525%
Answer(s): 5%, 400%, 50%, 525%