1200 fps to mach conversion result above is displayed in three different forms: as a decimal (which could be rounded), in scientific notation (scientific form, standard index form or standard form in the United Kingdom) and as a fraction (exact result). Every display form has its own advantages and in different situations particular form is more convenient than another. For example usage of scientific notation when working with big numbers is recommended due to easier reading and comprehension. Usage of fractions is recommended when more precision is needed.
If we want to calculate how many Mach are 1200 Feet per Second we have to multiply 1200 by 381 and divide the product by 414125. So for 1200 we have: (1200 × 381) ÷ 414125 = 457200 ÷ 414125 = 1.1040144883791 Mach
So finally 1200 fps = 1.1040144883791 mach
