## Round down numbers in pct format

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Posts: 286

# Round down numbers in pct format

Below is the data step I have which formats each number as a percent.  I want to round pct_in_school and pct_in_course  down to the nearest ten like so:

78% would be 70%

72% would be 70%

99% would be 90%

data rosters;

set allsets2;

diff = intck('WEEKDAY', entrydate, exitdate);

days_in_school = networkdays(entrydate, exitdate-1, "work.usholidays","holidaydate");

days_in_course = networkdays(dateenrolled, dateleft-1, "work.usholidays","holidaydate");

Pct_in_school=days_in_school/180;

Pct_in_course=days_in_course/180;

format Pct_in_school Pct_in_course percent12.;

run;

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Solution
‎04-09-2015 02:49 PM
Super User
Posts: 23,661

## Re: Round down numbers in pct format

Multiply by 10 to round to number such as 7.8, 7.2, 9.9. Apply the floor function and then convert back to percent by dividing by 10.

Simplifying the math it becomes:

Pct_in_school=floor(days_in_school/18)/10;

Pct_in_course=floor(days_in_course/18)/10;

format Pct_in_school Pct_in_course percent12.;

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Solution
‎04-09-2015 02:49 PM
Super User
Posts: 23,661

## Re: Round down numbers in pct format

Multiply by 10 to round to number such as 7.8, 7.2, 9.9. Apply the floor function and then convert back to percent by dividing by 10.

Simplifying the math it becomes:

Pct_in_school=floor(days_in_school/18)/10;

Pct_in_course=floor(days_in_course/18)/10;

format Pct_in_school Pct_in_course percent12.;

Super User
Posts: 13,498

## Re: Round down numbers in pct format

And just in case you might like to keep the original value but display use a custom format:

proc format ;

value MyPct

0   -< 0.1 = '  0%';

0.1 -< 0.2 = ' 10%'

0.2 -< 0.3 = ' 20%'

<repeat pattern>

0.9 -< 1  = ' 90%'

1            =  '100%'

;

run;

The spaces are so some procedures can display formatted values in an appropriate sorted appearance.

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