# Express one quantity as a percentage of another, using mental, written and calculator methods, eg 45 minutes is 75% of an hour

 1 Number detectives: Write one quantity as a percentage of another 2 Number detectives: Write one quantity as a percentage of another 3 Number detectives: Write one quantity as a percentage of another 4 The bread and butter issue: Calculate a price difference as a percentage of one amount 5 Detective Duck: Write a fraction as a percentage 6 Detective Duck: Write a fraction as a percentage 7 Detective Duck: Write a fraction as a percentage 8 Detective Duck: Write a fraction as a percentage 9 Detective Duck: Write a fraction as a percentage 10 Detective Duck: Write a fraction as a percentage 11 Detective Duck: Write one quantity as a percentage of another 12 Detective Duck: Write one quantity as a percentage of another 13 Detective Duck: Write one quantity as a percentage of another 14 Detective Duck: Write one quantity as a percentage of another 15 Detective Duck: Write one quantity as a percentage of another 16 Detective Duck: Calculate numbers from percentages 17 Detective Duck: Write one number as a percentage of another 18 Detective Duck: Calculate one sum as a percentage of another 19 Detective Duck: What percentage of 30 is 120? 20 Detective Duck: What percentage of 7 litres is 350mL? 21 Detective Duck: What percentage is 800m of 4km? 22 Detective Duck: 48 as a percentage of 12