3*3/4:(2*4/7-1*1/12)

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Let's break this down step by step:

2 * 4 = 87 - 1 = 61 * 1 = 18 / 7 = 1 1/73 * 3 = 99 / 4 = 2.25

Now we have: 2.25 / 1 1/7

To simplify this:

Convert 1 1/7 to an improper fraction: 7/7 + 1 = 8/72.25 / 8/7Multiply the fractions: 2.25 * 7/8 = 15.75 / 8Simplify the fraction: 15.75 / 8 = 1.96875

Therefore, 33/4:(24/7-1*1/12) is equal to approximately 1.96875