We are told that Franklin was y years old. We also know that 7 is 10% of y. We can find Franklin's age by figuring out what number's 10% is equal to 7. Recall that the percent equation is an equation in which the part is equal to the product of the corresponding percent and the whole. We can represent a is p percent of wwith the following equation.
a= p% * wWe can find what number's 10% is equal to 7 by substituting p%= 0.1 and a= 7 into the formula and solve for w using the Properties of Equality.
Knowing the value of w, let's look at the completed percent equation.
7= 10% * 70
We found that 7 is 10 % of 70. This means that Franklin was 70 years old.
