Subtracting Mixed numbers with Unlike denominators

UNLIKE DENOMINATOR is a fraction with an unequal bottom number.

For example: 4 1/6 - 1 3/4=?

step 1: Deal with fractions use L.C.M.(lowest Common Multiple) to create common denominator.

6- 6,12,18,24,30
4- 4,8,12,16,20
The lowest common multiple of 4 and 6 is 12.

step 2: Make an equivalent fraction.

1/6= 2/12 3/4=9/12

You cannot subtract 2 and 9. So, I barrow from the whole numbers.

2/12 - 9/12= 12/12 + 2/12 - 9/12= 5/12

step 3: Deal with the whole numbers.

3-1=2

step 4: combine the fraction and the whole number.

answer: 2 5/12

here is the picture!!