Simplify \(\frac{3t + 6}{3t}\). The numerator of this fraction will factorise as there is a common factor of 3. This gives \(\frac{3(t + 2)}{3t}\). Now, there is clearly a common factor of 3 between ...

Divide 4 throughout the fraction, which gives \(\frac{12 \div 4}{16 \div 4} = \frac{3}{4}\).