diff --git a/Telegram/SourceFiles/api/api_premium_option.cpp b/Telegram/SourceFiles/api/api_premium_option.cpp
index 257a4d12a1..135082e946 100644
--- a/Telegram/SourceFiles/api/api_premium_option.cpp
+++ b/Telegram/SourceFiles/api/api_premium_option.cpp
@@ -11,7 +11,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 namespace Api {
 
-constexpr auto kDiscountDivider = 5.;
+constexpr auto kDiscountDivider = 1.;
 
 Data::SubscriptionOption CreateSubscriptionOption(
 		int months,
@@ -20,7 +20,7 @@ Data::SubscriptionOption CreateSubscriptionOption(
 		const QString &currency,
 		const QString &botUrl) {
 	const auto discount = [&] {
-		const auto percent = monthlyAmount * months / float64(amount) - 1.;
+		const auto percent = 1. - float64(amount) / (monthlyAmount * months);
 		return std::round(percent * 100. / kDiscountDivider)
 			* kDiscountDivider;
 	}();