Question

2/3+4/5-12/3:0,36+90%-9,72

Answer 1

(2/3)+(4/5)-(12/3) - (0.36)+(90%-9.72)
-2.6 / -8.7  =  0.3

Answer 2

2/3 + 4/5 - 4 : 9/25 + 9/10 - 243/25
= 2/3 + 4/5 - 100/9 + 9/10 - 243/25
= 22/15 - 100/9 + 9/10 - 243/25
= 220/150 + 135/150 - 1458/150 - 100/9
= -1103/150 - 100/9
= -9927/1350 - 15000/1350
= -24927/1350