Find the following values without a calculator.
Give your answers in this manner. (Eg 10%, 20%, 30%, 40%)
- Express 900 mℓ as a percentage of 9 ℓ.
- Express 900 mℓ as a percentage of 5 ℓ.
- Express 90 min as a percentage of 2 hours.
- Express 9 min as a percentage of 90 seconds.
(a)
1 ℓ = 1000 mℓ
9 ℓ = 9000 mℓ
9009000 x 100% = 10%
(b)
900 mℓ = 0.9 ℓ
0.95 x 100% = 18%
(c)
1 h = 60 min
2 h = 120 min
90120 x 100% = 75%
(d)
1 min = 60 seconds
9 min = 540 seconds
54090 x 100% = 600%
Answer(s): 10%, 18%, 75%, 600%