Question

What is 17/18 + 1/20

Answer 1

179/180

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

`(17*10)/(10*18) + (1*9)/(10*18)`

`(170)/(180) + (9)/(180)`

179/180