It looks like it is rounding your percentages on the back end. 1 is 2.5% of 39, so it rounded up (since it is at or above the halfway point) to 3%.
I'm not completely sure it would work, but you may need to have the percentages calculated on your sheet so that you can use ROUNDDOWN or ROUNDUP and then reference those in the chart.
=INDEX(COLLECT({OPK Monthly Report 22-23 Unfilled 0-3}, {OPK Monthly Report 22-23 Month}, \"April\", {OPK Monthly Report 22-23 Grantee Name}, Grantee@row), 1)<\/p>"}]}},"status":{"statusID":3,"name":"Accepted","state":"closed","recordType":"discussion","recordSubType":"question"},"bookmarked":false,"unread":false,"category":{"categoryID":321,"name":"Smartsheet Basics","url":"https:\/\/community.smartsheet.com\/categories\/smartsheet-basics%2B","allowedDiscussionTypes":[]},"reactions":[{"tagID":3,"urlcode":"Promote","name":"Promote","class":"Positive","hasReacted":false,"reactionValue":5,"count":0},{"tagID":5,"urlcode":"Insightful","name":"Insightful","class":"Positive","hasReacted":false,"reactionValue":1,"count":0},{"tagID":11,"urlcode":"Up","name":"Vote Up","class":"Positive","hasReacted":false,"reactionValue":1,"count":0},{"tagID":13,"urlcode":"Awesome","name":"Awesome","class":"Positive","hasReacted":false,"reactionValue":1,"count":0}],"tags":[{"tagID":254,"urlcode":"Formulas","name":"Formulas"}]},{"discussionID":106563,"type":"question","name":"Embed Smartsheet fields into Automation emails","excerpt":"It would be great if we could embed Smartsheet fields into the body of an automation email. For example, I have several emails going to different departments and if the auto email could be set-up like below, it would save time, clicks, confusion, etc.: <> has submitted a new request. The request…","categoryID":321,"dateInserted":"2023-06-16T18:25:31+00:00","dateUpdated":"2023-06-19T08:27:13+00:00","dateLastComment":"2023-06-16T18:54:24+00:00","insertUserID":156053,"insertUser":{"userID":156053,"name":"jl.furstenberg","url":"https:\/\/community.smartsheet.com\/profile\/jl.furstenberg","photoUrl":"https:\/\/us.v-cdn.net\/6031209\/uploads\/defaultavatar\/nWRMFRX6I99I6.jpg","dateLastActive":"2023-06-16T18:52:38+00:00","banned":0,"punished":0,"private":false,"label":"✭✭"},"updateUserID":91566,"lastUserID":8888,"lastUser":{"userID":8888,"name":"Andrée Starå","title":"Smartsheet Expert Consultant & Partner | Workflow Consultant \/ CEO @ WORK BOLD","url":"https:\/\/community.smartsheet.com\/profile\/Andr%C3%A9e%20Star%C3%A5","photoUrl":"https:\/\/us.v-cdn.net\/6031209\/uploads\/userpics\/0PAU3GBYQLBT\/nXWM7QXGD6464.jpg","dateLastActive":"2023-06-19T12:08:16+00:00","banned":0,"punished":0,"private":false,"label":"✭✭✭✭✭✭"},"pinned":false,"pinLocation":null,"closed":false,"sink":false,"countComments":3,"countViews":31,"score":1,"hot":3373883695,"url":"https:\/\/community.smartsheet.com\/discussion\/106563\/embed-smartsheet-fields-into-automation-emails","canonicalUrl":"https:\/\/community.smartsheet.com\/discussion\/106563\/embed-smartsheet-fields-into-automation-emails","format":"Rich","tagIDs":[334,510],"lastPost":{"discussionID":106563,"commentID":381070,"name":"Re: Embed Smartsheet fields into Automation emails","url":"https:\/\/community.smartsheet.com\/discussion\/comment\/381070#Comment_381070","dateInserted":"2023-06-16T18:54:24+00:00","insertUserID":8888,"insertUser":{"userID":8888,"name":"Andrée Starå","title":"Smartsheet Expert Consultant & Partner | Workflow Consultant \/ CEO @ WORK BOLD","url":"https:\/\/community.smartsheet.com\/profile\/Andr%C3%A9e%20Star%C3%A5","photoUrl":"https:\/\/us.v-cdn.net\/6031209\/uploads\/userpics\/0PAU3GBYQLBT\/nXWM7QXGD6464.jpg","dateLastActive":"2023-06-19T12:08:16+00:00","banned":0,"punished":0,"private":false,"label":"✭✭✭✭✭✭"}},"breadcrumbs":[{"name":"Home","url":"https:\/\/community.smartsheet.com\/"},{"name":"Using Smartsheet","url":"https:\/\/community.smartsheet.com\/categories\/using-smartsheet"},{"name":"Smartsheet Basics","url":"https:\/\/community.smartsheet.com\/categories\/smartsheet-basics%2B"}],"groupID":null,"statusID":3,"attributes":{"question":{"status":"accepted","dateAccepted":"2023-06-19T08:27:32+00:00","dateAnswered":"2023-06-16T18:49:50+00:00","acceptedAnswers":[{"commentID":381065,"body":"