How do you answer unlike fraction?

Answer 1

It depends on the operation required. For example 3/7 and 4/9;

1. Addition - Find the common denominator and simplify.

3/7 + 4/9

Common Denominator is 63 (this is found by multiplying the 7 and the 9)

27/63 + 28/63 = 55/63 -------line 2

2. Subtraction - the same method as addition but instead of adding in line 2, you subtract

3. Multiplication - Simplify by ''canceling'', which is dividing the numerator and denominator of each fraction together.

3/7 * 4/9 = 4/21

4. Division - Invert the second fraction, change the operation to multiplication; and use the same method as multiplication.

3/7 * 9/4 = 27/28