Fix floating point math precision

plugins/lighthouse/src/components/Cards/LastLighthouseAuditCard.test.tsx

@@ -38,7 +38,7 @@ const websiteListResponse = data as WebsiteListResponse;
 let entityWebsite = websiteListResponse.items[2];
 
 describe('<LastLighthouseAuditCard />', () => {
-  const asPercentage = (fraction: number) => `${fraction * 100}%`;
+  const asPercentage = (fraction: number) => `${Math.round(fraction * 100)}%`;
 
   beforeEach(() => {
     (useWebsiteForEntity as jest.Mock).mockReturnValue({

plugins/lighthouse/src/components/Cards/LastLighthouseAuditCard.tsx

@@ -27,7 +27,7 @@ import { useWebsiteForEntity } from '../../hooks/useWebsiteForEntity';
 import AuditStatusIcon from '../AuditStatusIcon';
 
 const LighthouseCategoryScoreStatus = ({ score }: { score: number }) => {
-  const scoreAsPercentage = score * 100;
+  const scoreAsPercentage = Math.round(score * 100);
   switch (true) {
     case scoreAsPercentage >= 90:
       return (