explain 2/17-10/19
Let's evaluate: 217 -1019
ⓘTo add fractions, put them over the same denominator, then add the numerators
2×19 -10×1717×19
ⓘMultiplications are done before additions and subtractions:
2×19 = (10 + 9)×2 = 10×2 + 9×2 = 20 + 18 = 38‖-10×17 = (10 + 7)×-10 = 10×-10 + 7×-10 = -100 -70 = -170‖17×19 = 19×(10 + 7) = 19×10 + 19×7 = 190 + 133 = 323
38 -170323
ⓘThe numerator and the denominator are computed before the division: 38 -170 = -132
▶Result:   -132323
The approximate value of: -132323 equals:
▷ ≈ -0.4087