Mark wants to paint a mural. he has 1 1/3 gallons of yellow paint, 1 1/4 gallons of green paint, and 7/8 gallon of blue paint. mark plans to use 3/4 of each paint color. how many gallons of paint will he have left after painting the mural

Mark has:  1 1/3 = 4/3  gallons of Yellow
                 1 1/4 = 5/4  gallons of Green
                            7/8  gallons of Blue.

Total =  (4/3 + 5/4 + 7/8)    LCM = 24
        =  (32 + 30 + 21)/24 = 83/24  Gallons of Paint in total.

If he used 3/4 of each, he would have (1 - 3/4) = 1/4 of each left.

Therefore gallons left =  1/4 * (83/24) = 83/96 gallons left.
                                                     =  0. 8646 gallons left in total.

6/9 i need more characters in my answer