So basically 100% is a whole.
50% would therefore be a half because 50/100 = 1/2.
So therefore we know that 42 feet is equal to 1/2.
42 = [tex] \frac{1}{2} [/tex]
And now we just find what to multiply 1/2 by to get 100%.
1 / (1/2) = 2
So basically, multiply the whole equation by 2.
42 = 1/2
42 * 2 = 1/2 * 2
84 = 100%
So 42 feet is 50% of 84 feet.
