2 3/7 * 49/51 - 1 1/3 / (-2) / (9 - 1,5) / 25 = 17/7 * 49/51 - 4/3 / (-2) / 7,5 /25 =
7/3 +8/3 /0,3 = 7/3 + 8/3 /3/10 = 7/3 + 80/9 = 21/9 + 80/9 = 101/9 = 11 2/9
9*70=630
630-30=600
ответ = 600
4:100=0,04
0,04*28=1,12
0,04*40=1,6
1,60+1,12=2,72
4,00-2,72=1,28
otvet:1,28