Working out pro-rata salary gap - help!

[IFishWife]

If you are of mathematical mind, please can you help me work out the actual salary gap between Ms X and Ms Y

Ms X gets £50K per annum for 4 day week.

Ms Y gets £80K per annum for a 9 day fortnight.

The gap is obviously less than £30K, but by how much, do you know?

[fluffles]

assuming a 5 day working week??

Mrs X gets 4/5 of a full salary, so her full salary is 62.5k
Mrs Y gets 9/10 of a full salary, so her full salary is 88.9k

so the difference in salary if both were full time is 26.4k.

[IFishWife]

Thank you fluffles, you are a life saver. Yes, assuming 5 day week.

x

[hatwoman]

work out how much they earn / would earn if they worked one day a week
ms x - 12.5 k (50/4)
ms y - 17.78 (80/4.5)

then times by 5 to work out what they would earn ft

ms x - 62.5
ms y 88.9