5 4/19 ×3 4/7 +1 15/19 ÷7/25 -1 2/3 =

1. 5 4//19=99//19 2. 3 4//7=25//7 3. (99//19)*(25//7)=(2475//133) 4. 1 15//19=34//19 5. 7//25=0.28 6. (34//19)/0.28=(850//133) 7. (2475//133)+(850//133)=25 8. 1 2//3=5//3 9. 25-(5//3)=(70//3)