Answer:
179/180
Step-by-step explanation:
Step One
Find the prime factors of 18 and 20
18:3*3*2
20: 2 * 2 * 5
Step Two
You need two 2s two 3s and one 5 for the common denominator
The common denominator is 2 * 2 * 3 * 3 * 5 = 180
Step Three
Put the two fractions over 180
[tex]\dfrac{17*10}{10*18} + \dfrac{1*9}{10*18}[/tex]
[tex]\dfrac{170}{180} + \dfrac{9}{180}[/tex]
179/180
