24又9分之8除以8+30又9分之5乘5分之1
=(24+ 8/9 )*8 +(30+ 5/9)* 1/5
=24/8 + 8/9 *8 + 30 * 1/5 + 5/9 *1/5
= 3 + 1/9 + 6 + 1/9
=9又9分之2