Simplify the complex fraction by using Method I Express numb

Simplify the complex fraction by using Method I. Express numbers as integers or simplified fractions. 5/8 + 7/4/2/5 - 9/10 =

Solution

We have [ (5/8) +(7/4)]/ [ (2/5)-(9/10)] = [(5+ 7*2)/8]/[ (2*2 - 9)/ 10]= (19/8)/ (-5/10) = - ( 19/8)* (10/5) = - (19/8)*2 = -19/4.

Note: The LCM of 4 and 8 is 8; the LCM of 5 and 10 is 10 ; 1/(1/a) = a )