Percentage and its application

A

25

What percentage of 1280 is 832

65%

25

Convert 55% to fraction, ratio and decimal.

11/20

11:20

0.55

50

75 kg of fertiliser contain 16% of chemical A, 40% of chemical B and the rest is chemical C. Find the quantity of chemicals A ,B and C in the fertiliser.

The total quantity of the fertiliser = 75 kg

Quantity of chemical A = 16/100 × 75 = 12 kg

Quantity of chemical B = 40/100 × 75 = 30 kg

Quantity of chemical C = 75 – (12 + 30) 

                            = 75 -42 = 33 kg

B

25

Find the number whose 48% is 72

150

25

12% of 50

6

50

Express:

260 m as a percentage of 1 km

26%

C

25

_______ is always calculated on MP

Discount

25

18 1/3 % of 240

44

50

Express:

150 g as a percentage of 2 kg

7.5%

D

25

Convert the following to percentages.

4:5

80%

25

Convert the following to percentages.

7.25

725%

50

Express

960 g as a per cent of 5 kg 400 g

17 7/9%