if p:q =7:5 and q:s= 9:4, find p:s
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p:q=7:5=63:45(MULTIPLYING BY 9)
q:s=9:4=45:20(MULTIPLYING BY 5)
p:q:s=63:45:20
p:s=63:20
q:s=9:4=45:20(MULTIPLYING BY 5)
p:q:s=63:45:20
p:s=63:20
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