35% of 80
\(\begin{array}{rcl} 80 \cdot 35\ \% &=& 80 \cdot \frac{35}{100} \\ &=& 35 \cdot \frac{80}{100} \\ &=& 35 \cdot \frac{8}{10} \\ &=& \frac{35\cdot 8}{10} \\ &=& \frac{7\cdot 8}{2} \\ &=& 7\cdot 4 \\ &=& 28 \end{array}\)
