berapa hasil dari 3/5 x 5/6 + 4/5 - 9/10 : 3/4?

3/5x5/6=15/30~1/2
9/10:3/4=9/10x4/3=36/30~1 1/5
1/2+4/5-1 1/5=13/10-6/5=13/10-12/10=1/10

3/5 × 5/6 + 4/5 - 9/10 ÷ 3/4
= (3×5)/(5×6) + 4/5 - 9/10 × 4/3
= 15/30 + 4/5 - (9×4)/(10×3)
= 15/30 + 4/5 - 36/30
= 15/30 + 24/30 - 36/30
= (15 + 24 - 36)/30
= 3/30
= 1/10