Question

помогите номер 340 умоляю

Answer 1

1)0,8×7/12=8×7/10×12=7/15
2)1,2/3×0,6=5×6/3×10=2/2=1
3)1,25×32/45=125×32/100×45=8/9
4)4,5×3,1/3=45×10/10×3=15

Answer 2

3)=4/9