Eleven out of twelve divided by the unknown multiplied by two fifths equals three eighths OK, extra

Eleven out of twelve divided by the unknown multiplied by two fifths equals three eighths OK, extra


1
(11/12)/a*2/5=3/8
(11/12)/a=3/8*5/2
11/12=15a/16
15a=11/12*16
a=44/3*1/15
a=44/45
2
(11/12)/(a*2/5)=3/8
11/12=3/8*2a/5
11/12=3a/20
a=11/12*20/3
a=55/9