explain 2/7-5/9
Let's evaluate: 27 -59
ⓘTo add fractions, put them over the same denominator, then add the numerators
2×9 -5×77×9
ⓘMultiplications are done before additions and subtractions: 2×9 = 18
ℹ-5×7 = -35‖7×9 = 63
18 -3563
ⓘThe numerator and the denominator are computed before the division: 18 -35 = -17
▶Result:   -1763
The approximate value of: -1763 is:
▷ ≈ -0.2698