book Maths Puzzle Numerical Ability

Can someone help me with this problem?

I need the following problem the ratios in simplest form:

The ratio of 5 3/5 to 2 1/10

Thanks,
Sher

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book Other Question

I need to know how to graph
x+y=4
x+y=9

and i also need to know how many solutions it has.
can you help me please? thanks a lot! 3a+6b=-15
a=-2b-5

Use the substitution method to solve the system. If its dependant or inconsistant, so indicate.