Answer:
Step-by-step explanation:
The given expression is
[tex]5\frac{3}{4}+2\frac{1}{4} =7\frac{4}{8}=7\frac{1}{2}[/tex]
We will rewrite the expression
[tex]\frac{23}{4}+\frac{9}{4} =\frac{60}{8}=7\frac{1}{2}[/tex]
When we add the fraction
[tex]\frac{23+9}{4}[/tex] = [tex]\frac{32}{4}[/tex] = 8
While Andre says the answer is [tex]7\frac{1}{2}[/tex]
because Andre added the denominator where he has to make a common denominator that should be 4 instead of 8.
Andre made mistake in this step
Picture is given below :
