Write the ratio "$20$20 to $25$25" as a fraction in simplest form.

= $\frac{\editable{}}{\editable{}}$

Write the ratio $54:24$54:24 as a fraction in simplest form.

Write the ratio "$45$45 hours to $40$40 hours" as a fraction in simplest form.

Write the ratio "$£179$£179 to $£449$£449" as a fraction in simplest form.