15x/100 = 20y/100 => 15x = 20y => x/y = 20/15 = 4/3. Therefore, x : y = 4 : 3.
15x/100 = 20y/100 => 15x = 20y => x/y = 20/15 = 4/3। इसलिए, x : y = 4 : 3।