Aviation Mechanic - General, Airframe, and Powerplant › I. General › Task H. Mathematics

AM.I.H.S5

Skill

Convert between fractional and decimal numbers.

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Aviation Maintenance Technician Handbook - General p. 3-6
Chapter 3: Mathematics in Aviation Maintenance › The Decimal Number System › Converting Decimal Numbers to Fractions
inches. Convert 0.52 to a fraction. The decimal 0.52 is read as “fifty-two hundredths.” 0.52 = 52 “fifty-two” 100 “hundredths” In the above fraction of 52⁄100, we can divide 4 into each number resulting in a fraction ... inches. Convert the decimal 0.3123 to a common fraction to decide which socket would be the best fit for the bolt head. First, multiply the 0.3123 decimal by 64: Next, round the product to the nearest whole number…
Aviation Maintenance Technician Handbook - General p. 3-7
Chapter 3: Mathematics in Aviation Maintenance › Ratio
Decimal Equivalent Chart Figure 3-6 is a fraction to decimal to millimeter equivalency chart. Measurements starting at 1⁄64 inch and up to 3 inches have been converted to decimal numbers and to millimeters. Ratio A ratio…