Answer:
Find out the how many signers were there .
To prove
As given
There were n signers of the Declaration of Independence.
The oldest was Benjamin Franklin, who was y years old. 7 is 10% of y and n is 80% of y.
10% is written in the decimal form.
\(= \frac{10}{100}\)
= 0.10
80% is written in the decimal form.
\(= \frac{80}{100}\)
= 0.80
As given
7 is 10% of y
Than the equation becomes
7 = 0.10 × y
\(y = \frac{7}{0.10}\)
\(y = \frac{7\times 100}{10}\)
\(y = \frac{700}{10}\)
y = 70
As given
n is 80% of y
Than the equation becomes
n = 0.80 × y
Put the value of y in the above
n = 0.80 × 70
n = 56
Therefore the 56 signers of the Declaration of Independence.
