WEBVTT

1
00:00:00.000 --> 00:00:03.030
Here is the problem: 7 over 2 minus 1.

2
00:00:03.480 --> 00:00:07.311
Exact arithmetic with fractions (results kept in lowest terms).

3
00:00:08.111 --> 00:00:13.730
Rewrite both fractions with the least common denominator. The LCD of 2 and 1 is 2.

4
00:00:14.180 --> 00:00:17.013
Subtract the numerators and keep the denominator.

5
00:00:17.463 --> 00:00:19.611
Final answer in lowest terms.

6
00:00:20.411 --> 00:00:22.385
So the answer is 5 over 2.

7
00:00:22.835 --> 00:00:35.687
Fractions are combined over a common denominator for addition and subtraction, multiplied straight across, and divided by multiplying by the reciprocal. The result is reduced by the greatest common factor.

8
00:00:36.487 --> 00:00:40.272
Decimal check: 5 over 2 approximately 2.5.

9
00:00:40.722 --> 00:00:43.276
As a mixed number: 2 1 over 2.