2 / 3 plus 11 / 4 divided by 11 / 15 times 1 / 5 plus 1 / 4! Do me a favor!

2 / 3 plus 11 / 4 divided by 11 / 15 times 1 / 5 plus 1 / 4! Do me a favor!

(2/3)+(11/4)÷(11/15)×(1/5)+(1/4)
=(2 / 3) + (11 / 4) × (15 / 11) × (1 / 5) + (1 / 4) divided by a number is equal to multiplying by the reciprocal of the number
=(2 / 3) + (3 / 4) + (1 / 4) is the same denominator
=(2/3)+1
=5/3

What's the quotient of multiplying 8 / 9 by the largest single digit and dividing it by 5 / 4 and 8 / 15?

(8/9*9)÷(5/4*8/15)=8÷2/3=12

2 and a quarter times 5.5-2.25 + 3 and a half times nine fourths (write the simplified process) do me a favor

Two and a quarter times 5.5-2.25 + three and a half times nine quarters
=2.25×（5.5-1+3.5）
=2.25×8
=18

What is the quotient of nine tenths of two and nine tenths divided by 1.85 and one fourth

2 and 2 / 9 × 9 / 10 (1.85-1 / 4)
=20/9×9/10÷（1.85-1/4）
=2÷1.6
=1.25