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→Useful websites
{{#widget:YouTube|id=D8dA4pE5hEY}}
{{#widget:YouTube|id=D8dA4pE5hEY}}
==Useful websites==
==Useful websites==
# To see the best videos[https://www.khanacademy.org/math/pre-algebra/rates-and-ratios/ratios_and_proportions/v/introduction-to-ratios-new-hd-version click here]
# To see the best videos on ratio and proporsion[https://www.khanacademy.org/math/pre-algebra/rates-and-ratios/ratios_and_proportions/v/introduction-to-ratios-new-hd-version click here]
==Reference Books==
==Reference Books==