The person considers which size of McDonald's French fries would be the best to purchase.

Jim, affectionately known as "Everyone's Favourite Jim," unveiled his 'McDonald's Fries Theorum' on Twitter, which tested his wife's theory that buying medium fries is more cost-effective than buying large fries. He weighed a medium and large portion of chips in the McDonald's packaging and found that the larger fries weighed 20g heavier than the 116g medium ones. Jim then zeroed out the scales with a bowl and weighed the fries separately - the medium weighed 109g while the large weighed 127g. He found that the large had 116% of the fries of a medium, but at £2.29 vs £1.79, is 128% of the price.



(Image Source: https://metro.co.uk)

Through mathematical calculations, Jim was able to pinpoint the exact moment when buying medium fries becomes more cost-effective than buying large fries - if you buy five portions of medium fries, it's cheaper than four portions of large fries by 21p and you get 37g more fries.



(Image Source: https://metro.co.uk)

A man has come up with the ‘Mcdonald’s Fries Theorum’ to encounter the problem of whether it is better to buy medium or large McDonald’s fries money-wise.

Jim, popularly known as ‘Everyone’s Favourite Jim’, shared his ‘Mcdonald’s Fries Theorum’ on Twitter on Wednesday.

His wife had informed him that she only gets medium fries as a larger quantity doesn’t ‘actually have any more chips in them’, and thus, it isn’t a great deal.

The graphic designer, who mentioned he was swamped with work, decided to put his wife’s theory to the test – equipped with spreadsheets and kitchen scales.

Jim first weighed a medium and large portion of chips in the McDonald’s packaging – the larger fries weighed 20g heavier than the 116g medium ones.

‘FALSE: There are more fries in a large. Job done,’ Jim said.

But he stressed that this measurement includes the weight of the larger box. ‘So I zero out the scales with a bowl and weigh the chips,’ he added.

The medium fries weighed 109g, while the larger portion landed at 127g.

‘Which interestingly means that the large has 2g of extra cardboard,’ he added, showing a photo of nine chips laid out in size order on the scales.

‘A large has 116% of the fries of a medium, but, at £2.29 vs £1.79, is 128% of the price.

‘Surely, then, there is a point where it’s cheaper to buy more medium portions than large portions. Turns out, there is. And it’s not as many as you might think…’

Jim was able to calculate the exact moment when buying medium fries is more cost-effective than buying large fries with the aid of mathematics.

‘If you buy five portions of medium fries, it’s cheaper than four portions of large fries by 21p and you get 37g more fries!’ he said.

I wanted to find the crossover point where buying just one more portion of medium fries made it more cost-efficient than buying large fries. And here are the results.

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