To find the number of which 91 is 130%, you can set up the equation as follows:
Let \( x \) be the unknown number. According to the problem, 130% of \( x \) equals 91. You can express this mathematically as:
\[ 1.30x = 91 \]
To solve for \( x \), divide both sides of the equation by 1.30:
\[ x = \frac{91}{1.30} \]
Now calculate the value:
\[ x = 70 \]
So, 91 is 130% of 70.