九分之四乘以百分之三十七点五加八分之三除以五分之九
4/9*37.5%+3/8：9/5
=4/9*375/1000+3/8*5/9
=125/750+5/24
=5/30+5/24
=40/240+50/240
=90/240
=9/24
=3/8