Hitunglah penyelesaian dari 20% : 0,5 x 1/4. Jika hasil penyelesaiannya adalah n, maka hitunglah [2/3 x n] + [n x 10/4] – [1/2 : 2] =

20% : 0,5 x 1/4

= 20/100 x 2 x 1/4
= 40/400
= 1/10

n= 1/10

[2/3 x n] + [n x 10/4] – [1/2 : 2]
=[2/3 x1/10] + [1/10 x 10/4] – [1/2 : 2]
= [2/30] + [10/40] – [1/4]
= [2/30] + [1/4] – [1/4]
= (4+15-15 / 60)
= 4/60
= 1/15