Take the 30 and divide it by 100 and you get the percent.
Ex. 30/100 = .3
Then multiply 64 by the percent.
64 x .3 = 19.20
<span>13 i think srry if i get it wrong</span>
The opposite of the fraction one third would be negative one third. To be opposite, they must have differing signs. One number should be positive and the other number should be negative. It is different from reciprocal. To be a reciprocal, <span>one number should be the flipped fraction, or upside down version, of the other number.</span>
You need to clarify whether you need the x or the y or both