Why do i get this error? Argument of type ‘() => number’ is not assignable to parameter of type ‘number’.

EV3
1

Argument of type ‘() => number’ is not assignable to parameter of type ‘number’.

Heres the codeblock related:

function percentage(partialValue: number, totalValue: number) {
    return (100 * partialValue) / totalValue
}
sensors.gyro4.calibrate()
console.sendToScreen()
forever(function () {
    y = percentage(sensors.gyro4.angle, gyroVals.FULLPOWER)
})

happens at

y = percentage(sensors.gyro4.angle, gyroVals.FULLPOWER)