解: (9/8-5/60-4/9)÷3/5
= (9/8-5/60-4/9)*5/3
=9/8 *5/3-3/60 *5/3-4/9 *5/3
=15/8-1/12-20/27
=(45-2)/24-20/27
=43/24-20/27
=1+19/24-20/27
=1+(171-160)/216
=1+11/216
=1又11/216
