At a Spotlight craft store, Mei Ling buys a red ribbon that is 30 cm long and a blue ribbon that is 45 cm long. Express the ratio of the length of the red ribbon to the length of the blue ribbon in its simplest form.
Show Worked Solution
Worked Solution
Step 1: Write the ratio of red ribbon to blue ribbon.
Red : Blue = 30 : 45
Step 2: Find the highest common factor (HCF) of 30 and 45.
Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30
Factors of 45: 1, 3, 5, 9, 15, 45
HCF = 15
Step 3: Divide both terms by the HCF.
30 ÷ 15 = 2
45 ÷ 15 = 3
Simplest form: 2 : 3
Correct answer: 2 : 3
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