# Can you plss answer this for me thank you so much :) To perform the indicating operation and just reduce it to its lowest term if necessary. 7 1/7 - 2 ⅝ =?

1
by Chelleeers

2015-09-26T09:47:03+08:00

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Change the mixed number into improper fraction, so that we can answer it easily.

To change a mixed number into a improper fraction, the formula is:
dw + n = new numerator

wherein
d = denominator
w = whole number
n = numerator

Performing the operation:
7 1/7 as a improper fraction is:
7 x 7 + 1 = 50/7
2 5/8 as a improper fraction is:
8 x 2 + 5 = 21/8

Now our fraction can be answered properly, and easily.
50/7 - 21/8 = ?

Find the LCD.
7 : 7, 14, 21, 28, 35, 42, 49, 56
8 : 8, 16, 24, 32, 40, 48, 56

So 56 is the LCD of 50/7 and 21/8

56 is going to be our denominator in our answer.
56 / 7 x 50 = 400
56 / 8 x 21 = 147

400 - 147 is 253