Obtaining the total from a percentage

Question

$x$ is $20$ percent of $t$.

t=?; //to compute
x=198; 

Example

compressed = 64;
uncompressed = (100 / 20) * 64;

//is it correct?

How can I compute $t$?

Answer 1

x is 20% of t means: $x=0.2\cdot t \quad \implies  \quad t=5\cdot x$