To do this, we need to convert both fractions to have the same denominator. To do this, we can find the LCM of 12 and 10, which is 60. Next, we multiply the first fraction by 6/6, and the second fraction by 5/5. 7/10*6/6= 42/60, and 5/12*5/5= 25/60. Next, you subtract the fractions. 42/60-25/60 = 17/60. Hope this helps.