Add the ratio values together=5, then divide into £20=£4. Multiply £4 by 4=£16 to give the monetary value of the first ratio value, and by 1=£4 for the second ratio value. So £20 divided into the ratio 4:1 is £16 and £4. Another way of solving this is first to solve for x: 4x+x=20, 5x=20, so x=4 and 4x=16.