JSFiddle - React, Tailwind, and code Playground

JavaScript

const getPercantageValue = (votersCount, currentVoter) => (100/votersCount * currentVoter)

for (i = 1; i < 20; i++) {
  for (j = 1; j < 20;  j++) {
  	const a = getPercantageValue(i+j, i)
    const b = getPercantageValue(i+j, j)
    const aRounded = Math.round(a)
    const bRounded = Math.round(b)
    const abRoundedSum = aRounded + bRounded
    if (abRoundedSum !== 100) {
			console.log('ERROR - not 100% its: ', abRoundedSum, '%')
      console.log('Problem pair: a ', a, '=> ', aRounded, ' b ', b, '=> ', bRounded)
  }
}
}