Jerell, this is the solution to the subtraction:
Step 1: We find the least common denominator between 10 and 4, as follows:
• 10, ,20,, 30, 40, 50
,
• 4, 8, 12, 16, ,20,, 24, 28, 32, 36, 40
20 is the lowest common denominator
Step 2: Now we multiply the first fraction by 2 and the second one by 5, this way:
9/10 * 2/2 = 18/20
3/4 * 5/5 = 15/20
Step 3: Finally, we subtract 15 from 18, keeping 20 as the denominator, this way:
18/20 - 15/20 = 3/20
We can't simplify 3/20 and that is the answer to this subtraction.