Join us at FabCon Atlanta from March 16 - 20, 2026, for the ultimate Fabric, Power BI, AI and SQL community-led event. Save $200 with code FABCOMM.
Register now!The Power BI Data Visualization World Championships is back! Get ahead of the game and start preparing now! Learn more
Hi,
I am trying to subtract a measure from another based on a data field value, the subtraction working for numbers but, not percentage values. Can someone tell me what's wrong with the below DAX.
| Cur.Month | LastYearSameMonth | Diff |
| 98.93% | 98.59% | |
| 2.986215989 | 1.2795 | -1.70672 |
Hi @Rajsheisan ,
I do not know what do these measures [LastYearSameMonth] and [Cur.Month] look like, but can you try to use the function VALUE() to transform text to number.
IFERROR( FORMAT(CALCULATE(value([LastYearSameMonth])-value([Cur.Month])), "0.00%"), BLANK())
Best Regards
Community Support Team _ chenwu zhu
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Thanks. I managed get it done.
Hi @Rajsheisan ,
I'm glad your problem is solved. If my answer was helpful to you, please mark my reply or if you have a better way, please share and mark it as a solution so more people can find the answer quickly.
Best Regards
Community Support Team _ chenwu zhu
Check out the November 2025 Power BI update to learn about new features.
Advance your Data & AI career with 50 days of live learning, contests, hands-on challenges, study groups & certifications and more!
| User | Count |
|---|---|
| 58 | |
| 45 | |
| 42 | |
| 20 | |
| 18 |