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Simplify fraction function

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This commit is contained in:
Sam Becker 2025-03-28 15:52:28 -05:00
parent ed383ae56d
commit 50f3c4f9c2
1 changed files with 7 additions and 8 deletions
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15
src/utility/number.ts
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@ -28,14 +28,15 @@ const MAX_FRACTION_LENGTH = 4; // Permit 1/64 but not 1/100
const formatDecimalToFraction = (_decimal: number) => {
// Prevent imprecision which causes numbers such as,
// 0.1 to equal 0.10000000000000009
const decimal = parseFloat(_decimal.toPrecision(8));
if (Math.abs(Math.abs(decimal) - 0.167) <= FRACTION_TOLERANCE) {
const decimal = Math.abs(parseFloat(_decimal.toPrecision(8)));
if (Math.abs(decimal - 0.167) <= FRACTION_TOLERANCE) {
return '1/6';
} else if (Math.abs(Math.abs(decimal) - 0.333) <= FRACTION_TOLERANCE) {
} else if (Math.abs(decimal - 0.333) <= FRACTION_TOLERANCE) {
return '1/3';
} else if (Math.abs(Math.abs(decimal) - 0.667) <= FRACTION_TOLERANCE) {
} else if (Math.abs(decimal - 0.667) <= FRACTION_TOLERANCE) {
return '2/3';
} else if (Math.abs(Math.abs(decimal) - 0.833) <= FRACTION_TOLERANCE) {
} else if (Math.abs(decimal - 0.833) <= FRACTION_TOLERANCE) {
return '5/6';
} else {
const length = decimal.toString().length - 2;
@ -73,9 +74,7 @@ export const formatNumberToFraction = (number: number) => {
integer += 1;
}
const fraction = decimal !== 0
? formatDecimalToFraction(Math.abs(decimal))
: '';
const fraction = decimal !== 0 ? formatDecimalToFraction(decimal) : '';
// Ensure fractions aren't too long
if (!fraction || fraction.length <= MAX_FRACTION_LENGTH) {