Arithmetic Operators
Arithmetic operations perform the basic mathematical operations of addition, subtraction, multiplication, division, and modulo within an expression or any numerical value retrieved as part of query clauses. Additionally, N1QL provides a negation operation which changes the sign of a value.
These arithmetic operators only operate on numbers. In N1QL, arithmetic operators have their usual meaning. However, in any of these expressions:

Operator  Description 

+ 
Add values. 
 
Subtract right value from left value. 
* 
Multiply values. 
/ 
Divide left value by right value. 
% 
Modulo. Divide left value by right value and return the remainder. NOTE: Modulo is an integer operator and will use only the integer part of each value. 
 
Negate value. 
Syntax
There are six different arithmetic syntaxes:
expr1 + expr2 expr1  expr2 expr1 * expr2 expr1 / expr2 expr1 % expr2 expr1
Arguments
 expr1, expr2

Number or an expression that results in a number value.
 Return Values

A number, representing the value of the arithmetic operation.
Examples
Example 1: Select the longest flight and return its two airports and the distance in feet.
SELECT sourceairport, destinationairport, ROUND(distance) AS DistanceInMiles, ROUND(distance)*5280 AS DistanceInFeet FROM `travelsample`.inventory.route ORDER BY distance DESC LIMIT 1; Returns: [ { "DistanceInFeet": 72906240, "DistanceInMiles": 13808, "destinationairport": "DFW", "sourceairport": "SYD" } ]
Example 2: Select the modulo of 5 and 3 and compare to the modulo of 5.4 and 3.4.
SELECT 5 % 3; Returns: [ { "$1": 2 } ] SELECT 5.4 % 3.4; Returns: [ { "$1": 2 } ]