diff --git a/ch10.asciidoc b/ch10.asciidoc
index f75140e8..272f0739 100644
--- a/ch10.asciidoc
+++ b/ch10.asciidoc
@@ -247,7 +247,7 @@ Unlike regular transactions, the coinbase transaction does not consume (spend) U
 ((("coinbase transactions", "rewards and fees")))((("fees", "transaction fees")))((("mining and consensus", "rewards and fees")))To construct the coinbase transaction, Jing's node first calculates the total amount of transaction fees by adding all the inputs and outputs of the 418 transactions that were added to the block. The fees are calculated as:
 
 ----
-Total Fees = Sum(Inputs) - Sum(Outputs)
+Total Fees = Sum(Inputs) – Sum(Outputs)
 ----
 
 In block 277,316, the total transaction fees are 0.09094928 bitcoin.