Question

Check *will medal*: 7/12 + 5/9 - 7/8

The LCM of 12, 9, 8 is 72. So: 7/12 = 12 x 6 = 72 and 7 x 6 = 42. So 42/72.

5/9 = 9 x 8 = 72 and 5 x 8 = 40. So 40/72.

7/8 = 8 x 9 = 72 and 7 x 9 = 63. So 63/72.

42/72 + 40/72 - 63/72 = 19/72.

Thanks c: