in src/visual.ts [723:736]
private static getPercentChange(startValue: number, endValue: number): string {
if (startValue === 0) {
return "n/a";
}
let diff = endValue - startValue;
let percentChange = Math.abs(diff / startValue);
if (endValue < startValue) {
percentChange = percentChange * -1;
}
return this.percentFormatter(percentChange * 100, true);
}