小明的体重是x千克,是小华体重的1.2倍,小华的体重 千克.
3÷ ===0.75.
2÷ =8: =0.75= %= .
20%= ÷40=40: = [填小数]=× .
÷12===10÷( )=.
= %=12÷ =9: =.