90 persen - 9/12 : 0,45 + dua 2/3 tlg pakai cara ya

90% - 9/12 ÷ 0,45 + 2 2/3
= 90/100 - 3/4 ÷ 45/100 + 8/3
= 9/10 - 3/4 x 20/9 + 8/3
= 9/10 - 60/36 + 8/3
= 9/10 - 5/3 + 8/3
= 27/30 - 50/30 + 80/30
= (-23/30) + 80/30
= 57/30 = 1 27/30 = 1 9/10.




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