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Moeja
well a ratio is a fraction but with a colon so 7/12 would be 7:12

                                                                         
Baby99
Ratio basically means half of the diameter. EX: The Diameter is 12 , the ratio would be 6. Or ratio could just mean what to what. EX: Say theres a classroom w/ 11 boys and 8 girls the ratio would be 11:8 or 11|8 or 11 to 8