Update partition-data.md

Clarify number of logical partitions on each physical partition.

Author: deborahc

articles/cosmos-db/partition-data.md

@@ -44,7 +44,7 @@ In brief, here's how partitioning works in Azure Cosmos DB:
 
 * You provision a set of Azure Cosmos DB containers with **T** RU/s (requests per second) throughput.
 * Behind the scenes, Azure Cosmos DB provisions physical partitions needed to serve **T** requests per second. If **T** is higher than the maximum throughput per physical partition **t**, then Azure Cosmos DB provisions **N = T/t** physical partitions. The value of maximum throughput per partition(t) is configured by Azure Cosmos DB, this value is assigned based on total provisioned throughput and the hardware configuration used. 
-* Azure Cosmos DB allocates the key space of partition key hashes evenly across the **N** physical partitions. So, each physical partition hosts **1/N** partition key values (logical partitions).
+* Azure Cosmos DB allocates the key space of partition key hashes evenly across the **N** physical partitions. So, the number of logical partitions each physical partition hosts is **1/N** * number of partition key values.
 * When a physical partition **p** reaches its storage limit, Azure Cosmos DB seamlessly splits **p** into two new physical partitions, **p1** and **p2**. It distributes values corresponding to roughly half of the keys to each of the new physical partitions. This split operation is completely invisible to your application. If a physical partition reaches its storage limit and all of the data in the physical partition belongs to the same logical partition key, the split operation does not occur. This is because all the data for a single logical partition key must reside in the same physical partition. In this case, a different partition key strategy should be employed.
 * When you provision throughput higher than **t*N**, Azure Cosmos DB splits one or more of your physical partitions to support the higher throughput.