exam Maths Puzzle Numerical Ability

How do you subtract this rational expression: 5m+8/m-1 - m-3/m-1? Whats this answer?

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exam Other Question

If 70 precent of refrigerators in the United States contain n.l.r.m.i.t.( no longer recognizable moldy icky things), and 7 out of 8 of these contain more than one n.l.r.m.i.t. what percent of refrigerators contain more than one n.l.r.m.i.t.? Barry can do a certain job in 3 hours. whereas it takes Sanchez 5 hours to do the same job. How long would it take them to do the job working together?