How to convert a:b and b:c into a:b:c ?? Multiply a and b vertically to get the value of 'a' Multiply b and b crossly to get the value of 'b' Multiply 'b' and 'c' vertically to get the value of 'c' How to convert a:b and b:c and c:d into a:b:c:d ?? Multiply a , b and c vertically to get the value of 'a' Multiply b , c and a vertically to get the value of 'd' Multiply b , b and c crossly to get the value of 'b' Multiply b , c and c crossly to get the value of 'c' Hence, the conversion can be made easily with these tricks. Have a bright day. Any queries? Post your comment below. Bye.