[tex]\sf \frac{3}{4} \div \frac{3}{4} [/tex]
[tex]\sf \longmapsto \frac{3}{4} \times \frac{4}{3} [/tex]
[tex]\sf \longmapsto \frac{3 \times 4}{4 \times 3} [/tex]
[tex]\sf \longmapsto \frac{12}{12} [/tex]
[tex]\sf \longmapsto \cancel{ \frac{12}{12}{ } }[/tex]
[tex]\sf \longmapsto1[/tex]
OR the last 2 steps can also be written as,
[tex]\sf \longmapsto \frac{12 \div 12}{12 \div 12} [/tex]
[tex]\sf \longmapsto1[/tex]
