explain 2/15-16/19
Let's calculate: 215 -1619
ⓘTo add fractions, put them over the same denominator, then add the numerators
2×19 -16×1515×19
ⓘMultiplications are done before additions and subtractions:
2×19 = (10 + 9)×2 = 10×2 + 9×2 = 20 + 18 = 38‖-16×15 = -16×(10 + 5) = -16×10 -16×5 = -160 -80 = -240‖15×19 = 19×(10 + 5) = 19×10 + 19×5 = 190 + 95 = 285
38 -240285
ⓘThe numerator and the denominator are computed before the division: 38 -240 = -202
▶Result:   -202285
The approximate value of: -202285 equals:
▷ ≈ -0.7088