Cosmetics Formulation Development

I would like to ask for advice Now the formula has a little smell of the ingredients, so I want to add Mon Rose extract to the formula to mask the smell of the ingredients and make the formula have a mild rose scent, not pungent. Must add สารสกัดดอกกุหลาบมอญ how many % is good? The recipe contains the following ingredients. Bifida Ferment Lysate 9% beta glucan 3% Prebio-care 1% PiteraEx 1% Snow Mushroom Hyaluron 1% Allantoin 0.3% 4D Hyaluronic Acid 5% Lactobacillus Ferment 1% Rosa Hybrid Cell Extract 2% Apple Stem Cell Extract powder 2% Matrixyl 3000 3% Adenosine 0.5% CICA 0.5% Madecassoside 0.5% dl-alpha tocopherol 0.1% Tocotrienols 0.5% Squalane 1% Phospholipid 1% Ethoxydiglycol 2% Skin-Barrier 5% Mild Preserved Eco 1% Satin Cream Maker 1% Water 58.6%

Hello, if you want just a light scent, you can add 1-2%.