Question 248710
Remember that any fraction of the form {{{a/b}}} can be rewritten as {{{(ka)/(kb)}}} where 'k' is some number. In other words, we multiply both the numerator and denominator of {{{a/b}}} by 'k' to get {{{(ka)/(kb)}}}.



In particular, the fraction {{{4/5}}} can be multiplied by some number to get some other fraction. Since we want the denominator to be equal to 20, this means that we multiply the denominator of 5 by 4 to get 5*4=20. We must do the same to the numerator. So what we've done is:


{{{4/5=(4*highlight(4))/(5*highlight(4))=16/20}}}



So {{{4/5=16/20}}} which means that {{{16/20}}} is an equivalent fraction to {{{4/5}}} but it has a denominator of 20.