Question

Tamika had a 4 by 7 inch photograph enlarged both length and width were increased to 130% of the original size find the perimeter of the enlarged photograph

Answer 1

Ahemmm whatever% of anything is just (whatever/100) * anything.

therefore, 130% of 4 is just (130/100) * 4

and 130% of 7 is just (130/100) * 7

so the new size is 

$\bf 4+\left(\frac{130}{100}\cdot 4 \right)\implies 4+\cfrac{26}{5}\implies \cfrac{46}{5}\implies 9\frac{1}{5} \\\\\\ 7+\left( \frac{130}{100}\cdot 7 \right)\implies 7+\cfrac{91}{10}\implies \cfrac{161}{10}\implies 16\frac{1}{10}$