# Starter Questions 21/02/11 1. Calculate the circumference 15cm

Starter Questions 21/02/11 1. Calculate the circumference 15cm 2. Calculate the diameter of the circle if the circumference is 15.7m 3. Calculate the area of the circle 40mm 21/02/11 Percentages Learning Intention 1.Convert percentages to fractions and decimals. 2.Change fraction to percentages. 3.Find percentage values. 21/02/11 Percentages Put over 100 30% Put over 100 70%

0.3 3 10 3.0 30 3 100 10 0.3 0.7 7 10 7.0 70 7 100 10 0.7 21/02/11 What simple % is missing 4 80% = Percentages 5

Percentage 50 25 1 2 1 4 Fraction 1 2 20 66 3 3 1 2 1 3 3 5 75 33 3 4 40 60

10 30 70 90 2 5 3 5 1 10 3 10 7 10 9 10 Example : Find 20% of 450 20 1 = 100 5 1

of 450 = 450 5 = 90 5 How to find % of a quantity using a calculator 21/02/11 50 1 0.5 100 2 example Find 50% of 300 Step 1 : Convert % to a decimal 0.5 of 300 Step 2 : of means x 0.5 300 Step 3 : Do sum 0.5 300 150 Calculator Keys 5 0

1 0 0 x 3 0 0 = 150 21/02/11 Percentages Learning Intention 1.Convert percentages to fractions and decimals. 2.Change fraction to percentages. 3.Find percentage values.

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