This applet helps you to reduce a m x n matrix A to row echelon form or further  to  reduced  row echelon form by performing elementary row operations. To do this operate as following :

• Select the decimal / fraction mode for your entries.
• Select the order of the matrix and click OK to display the matrix. You can change the entries of the matrix.
• Click the Display Matrix [A | I_m] and start doing.
• You can start performing elementary row operations with the help of buttons in the applet.