五分之二乘百分之六十加上二十分十九乘五分之二加二十分十九乘百分之六十
=2/5*60/100+ 19/20 *2/5+19/20*60/100
=2/5*3/5+ 19/20 *(2/5+3/5)
=6/25+ 19/20
=24/100+ 95/100
=119/100
五分之二乘百分之六十加上二十分十九乘五分之二加二十分十九乘百分之六十
=2/5*60/100+ 19/20 *2/5+19/20*60/100
=2/5*3/5+ 19/20 *(2/5+3/5)
=6/25+ 19/20
=24/100+ 95/100
=119/100