Responsive web design has become essential because different devices like tablets and smartphones have different screen sizes. Fixed layout is not responsive, meaning you cannot adjust the design to different screens or devices automatically.
Also, fixed layout requires that you design the website or web application with specific widths, which means that it may look perfect on a desktop computer but can be difficult to view on a smartphone or tablet.
In a fixed layout you have a minimum width and height. Floating elements, such as logos and images, may be placed to fit inside the overall design. With no positioning of elements the website will be neatly aligned. However, when users view it on different devices, these elements will not always remain in the same location.
Responsive web design is about creating websites and applications that look good on any device and is built on media queries. Responsive design takes into account the size and resolution of the user's device and the size of their browser window. It then adjusts the elements to make the website look and feel the same even if it is displayed on a completely different device.
In conclusion, fixed layout responsive is not the same as responsive web design. Responsive design is the best approach because it ensures that all elements will look consistent on any device.