includes/entities/class-fs-pricing.php
function annual_discount_percentage() {
			return floor( $this->annual_savings() / ( $this->monthly_price * 12 * ( $this->is_unlimited() ? 1 : $this->licenses ) ) * 100 );
		}
function annual_discount_percentage() {
			return floor( $this->annual_savings() / ( $this->monthly_price * 12 * ( $this->is_unlimited() ? 1 : $this->licenses ) ) * 100 );
		}
function annual_discount_percentage ( ) { return floor ( $ this -> annual_savings ( ) / ( $ this -> monthly_price * 12 * ( $ this -> is_unlimited ( ) ? 1 : $ this -> licenses ) ) * 100 ) ; }
Get annual over monthly discount.

@author Vova Feldman (@svovaf)
@since  1.1.8

@return int
Get annual over monthly discount .