EXERCISE 15.3B 1 In a survey of 100 cars, 47 were white, 23 were blue and 30 were red. Express each of these numbers as a percentage of the total. 2 of the surface of the Earth is water. Express this as a percentage. 3 There are 200 birds in a flock. 120 of them are female. What percentage of the flock is: a) female b) male? percentages as fractions of 100. 4 Write these a) 73% b) 28% c) 10% 5 Write these fractions as percentages. 27 a) 100 b) 10 c) 50 6 Convert the following percentages to decimals. a) 39% d) 7% b) 47% e) 2% c) 83% f) 20% d) 25% d) 7 Convert the following decimals to percentages. a) 0.31 d) 0.05 b) 0.67 e) 0.2 c) 0.09 f) 0.75