Solve the Fraction Division Problem: (1 7/8 ÷ 4/5) ÷ (3 x 8) = ?

Question

(178:45):(38)=? (1\frac{7}{8}:\frac{4}{5}):(3\cdot8)=\text{?}

Video Solution

Solution Steps

00:00 Solve
00:03 Convert from number and fraction to fraction
00:10 Division is also multiplication by the reciprocal
00:25 Make sure to multiply numerator by numerator and denominator by denominator
00:39 Division moves to the denominator
00:42 Break down 15 into factors 5 and 3
00:51 Reduce what's possible
00:54 And this is the solution to the question

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Convert mixed number to improper fraction.
  • Step 2: Perform division of fractions and evaluate further operations.
  • Step 3: Simplify the final expression.

Let's work through each step:
Step 1: Convert 178 1\frac{7}{8} to an improper fraction:
178=158 1\frac{7}{8} = \frac{15}{8} , since 1×8+7=15 1 \times 8 + 7 = 15 .

Step 2: Divide 158 \frac{15}{8} by 45 \frac{4}{5} :
Instead of dividing, multiply by the reciprocal of 45 \frac{4}{5} . Thus, 158:45=158×54=7532 \frac{15}{8} : \frac{4}{5} = \frac{15}{8} \times \frac{5}{4} = \frac{75}{32} .

Step 3: Divide the result by 38 3 \cdot 8 , which equals 24 24 :
We have 7532:24=7532×124=75768 \frac{75}{32} : 24 = \frac{75}{32} \times \frac{1}{24} = \frac{75}{768} .

Simplifying 75768 \frac{75}{768} , we find the greatest common divisor of the numerator and the denominator is 3:
75÷3768÷3=25256 \frac{75 \div 3}{768 \div 3} = \frac{25}{256} .

Therefore, the answer to the problem is 25256 \frac{25}{256} .

Answer

25256 \frac{25}{256}