Answer: 70%
Step-by-step explanation: Since a percent is a ratio that compares a number to 100, we first find a fraction that's equivalent to 7/10 that has a 100 in the denominator.
To do this, we set up a proportion.

Now we can use cross products to find the missing value.
700 = 10n
÷10 ÷10
70 = n
So we can write the fraction 7/10 as 70%.