Вычислите (7/15-3/40-1/24):0.7​

[(7/15)-(3/40)-(1/24)]÷0,7=[((7×16-3×6-1×10)/240)]÷0,7=[(112-18-10)/240]÷0,7=[(112-28)/240]÷0,7=[(84/240)]÷0,7=(84/240)÷(7/10)=(84/240)×(10/7)=(84×10)/(240×7)=(12×7×10)/(12×2×10×7)=(1/2)=0,5.