вычислить 0.25+1/12:(1/3x1.25-9/16) кому не трудно помогите пожалуйста

0,25+1/12: (1/3* 1,25- 9/16)= 25/100+ 1/12: (1/3* 1 25/100- 9/16)= 1/4+ 1/12: (1/3* 1 1/4- 9/16)= 1/4+ 1/12: (1/3* 5/4- 9/16)= 1/4+ 1/12: (5/12- 9/16)= 1/4+ 1/12: [(5*4)/(12*4)- (9*3)/(16*3)] = 1/4+ 1/12: (20/48- 27/48)= 1/4+ 1/12: (-7/48)= 1/4+ 1/12* (-48/7)= 1/4+ 1/1* (-12/7)= 1/4 - 12/7= (1*7)/(4*7) - (12*4)/(7*4)= 7/28 - 48/28= -41/28= -1 13/28.