Question

4½ menos 2¾ help pfvrrr

Answer 1

$\mathsf{4\dfrac{1}{2}-2\dfrac{3}{4}=\dfrac{4\times2+1}{2}-\dfrac{2\times4+3}{4}=\dfrac{9}{2}-\dfrac{11}{4}}\\\mathsf{\dfrac{18-11}{4}=\dfrac{7}{4}}$