Hasil 1.8 : 2 1/4 x 5/8

= 18/10 : 9/4 x 5/8
= 18/10 x 4/9 x 5/8
= 360/720 x 360/360
= 1/2

18/10 : 21/4 x 5/8
18/10 x 4/21 x 5/8
360 / 1680
= 3 / 226
= 0,0132