Social Media Banner Design

I'm seeking a high-quality, visually appealing social media banner/post for Instagram and Facebook. This is a one-time, single-image project with a small scope — ideal for beginner to intermediate designers looking to build their portfolio or earn quick cash.

This banner will promote a "Limited-Time Offer" for a small business.

Requirements:
- Promote a "Limited-Time Offer" or Announcement
- Suitable for Instagram (square) and Facebook (landscape or square)
- Text: Special Discount Percentage
- Style: Professional and Minimalist

Ideal Skills and Experience:
- Graphic design proficiency
- Experience with social media graphics
- Strong attention to detail
- Portfolio showcasing similar work

Looking forward to your creative inputs!