\[\frac{0.6}{0.14}=\frac{60}{14}=\frac{30}{7}.\]
\[\frac{1\frac45}{0.3}=\frac{\frac95}{\frac3{10}}=\frac95\cdot\frac{10}{3}=6.\]
Разность: \[\frac{30}{7}-6=\frac{30}{7}-\frac{42}{7}=-\frac{12}{7}=-1\frac57.\]
Ответ: 1) \(-1\frac57\).