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7-8        ARMY AIR FORCES

l. Exercises. -- In the following exercises, express the quotient as a decimal. Round off the decimal part of the quotient to two places.
   (1) 73.01/3.4
   (2) .345/.36
       Solution:

Since only two decimal places are to be obtained, the quotient is rounded off to .96.
  If the figure to be thrown away is greater than or equal to 5, increase the figure on the left by 1. If the figure is less than 5, do not change the preceding figure. Thus: .953=.95; 1.057=106; 1.053=1.05, etc.
   (3) 13.37/.834
   (4) 14.705/8.64                        1.70   Answer.
   (5) (157 miles)/(17.3 hours)
   (6) 1,942.4/.0035                 554971.43   Answer.
   (7) 9.63/145.4
   (8) (198 miles)/(59 minutes) 3.19 miles/min.  Answer.
   (9) (5,280 feet)/(60 seconds)
   (10) 19.437/38.6                        .50   Answer.
   8. Conversion of decimal fractions to common fractions. -- a. A number which consists of a decimal point followed by a sequence of figures is called a decimal fraction. Thus, .33, .9899, .00467, and .00335 are all decimal fractions. Since 33 divided by 100 is .33, then .33=33/100. Similarly, .9899=9.899/10,000, and .00467=467/100,000. Therefore, to express any decimal fraction in fractional form, write the number without the decimal point and divide it by 1 followed by as many zeros as there are figures after the decimal point in the given number.
   (1)Example: Express .023678 in fractional form
      Solution:
                       FIGURE 17.
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