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2 1/2 - 3/4 / (3/5 + 1 2/5) times 4
please answer! thank you so much! :)

User Rishabh
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1 Answer

6 votes

Answer is: 1

Explaination:

2 · 2 + 1/2 = 4 + 1/

2= 5/2

To find a new numerator:

a) Multiply the whole number 2 by the denominator 2. Whole number 2 equally 2 * 2/2

= 4/2

b) Add the answer from previous step 4 to the numerator 1. New numerator is 4 + 1 = 5

c) Write a previous answer (new numerator 5) over the denominator 2.

Two and one half is five halfs

Subtract: 5/2

- the result of step No. 4 = 5/2

- 3/2

= 5 - 3/2

= 2/2

= 2 · 1/2 · 1

= 1

It is suitable to adjust both fractions to a common (equal, identical) denominator for adding, subtracting, and comparing fractions. The common denominator you can calculate as the least common multiple of both denominators - LCM(2, 2) = 2. In practice, it is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 2 × 2 = 4. In the following intermediate step, cancel by a common factor of 2 gives 1/1.

In other words - five halfs minus three halfs is one.

User Peter Keuter
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