explain 7/15+9/17
Let's calculate: 715 + 917
ⓘTo add fractions, put them over the same denominator, then add the numerators
7×17 + 9×1515×17
ⓘMultiplications are done before additions and subtractions:
7×17 = (10 + 7)×7 = 10×7 + 7×7 = 70 + 49 = 119‖9×15 = (10 + 5)×9 = 10×9 + 5×9 = 90 + 45 = 135‖15×17 = 17×(10 + 5) = 17×10 + 17×5 = 170 + 85 = 255
119 + 135255
ⓘThe numerator and the denominator are computed before the division: 119 + 135 = 254
▶Result:   254255
The numeric value of: 254255 equals:
▷ ≈ 0.9961