Question:
[tex]78\text{ \% of 70}[/tex]78% means
[tex]78\text{ \%=}\frac{\text{78}}{100}[/tex]To proportion, we will have that
[tex]\frac{78}{100}=\frac{x}{70}[/tex]Cross multiply, we will have
[tex]\begin{gathered} \frac{78}{100}=\frac{x}{70} \\ 100\times x=78\times70 \\ 100x=5460 \\ \text{divide both sides by 100} \\ \frac{100x}{100}=\frac{5460}{100} \\ x=54.6 \end{gathered}[/tex]Hence,
78% of 70 = 54.6