4.21*(-4/7)+4/7*(2.79)+8*1/100*125
=-4.21*4/7+4/7*(2.79)+(8*125)*1/100
=(-4.21+2.79)*4/7+1000*1/100
=-1.42*4/7+10
=(70-5.68)/7
=1608/175
4.21*(-4/7)+4/7*(2.79)+8*1/100*125
=-4.21*4/7+4/7*(2.79)+(8*125)*1/100
=(-4.21+2.79)*4/7+1000*1/100
=-1.42*4/7+10
=(70-5.68)/7
=1608/175