甲数是30,乙数是20,乙数是甲数的( )( ),甲数比乙数多_%,乙数比甲数少_%.

问题描述:

甲数是30,乙数是20,乙数是甲数的

(  )
(  )
,甲数比乙数多______%,乙数比甲数少______%.

①20÷30=

2
3

答:乙数是甲数的
2
3

②(30-20)÷20
=10÷20
=0.5
=50%
答:甲数比乙数多50%.
③(30-20)÷30
=10÷30
≈0.333
=33.3%
答:乙数比甲数少33.3%.