exam Maths Puzzle Numerical Ability

how do i get the answer to solving systems using augmented matrices

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The interest rate on an equity line of credit was 7 7/8 % last month. This month the interest rate is 10 3/2%. How many percentage points has the interest rate increased?

Thank you for your help.
Subtract. Express your answer in simplest form.


2/5 subtract y/y-2

a. -3y-4/5(y-2)

b. -3y-4/y-2

c. -3y-2/5(y-2)

d. -3y-2/y-2



please help thank you so much.