Answer:
6 5/8 - 4 = 21
8
= 25
8
= 2.625
Step-by-step explanation:
Conversion a mixed number 6 5
8
to a improper fraction: 6 5/8 = 6 5
8
= 6 · 8 + 5
8
= 48 + 5
8
= 53
8
To find new numerator:
a) Multiply the whole number 6 by the denominator 8. Whole number 6 equally 6 * 8
8
= 48
8
b) Add the answer from previous step 48 to the numerator 5. New numerator is 48 + 5 = 53
c) Write previous answer (new numerator 53) over the denominator 8.
Six and five eighths is fifty-three eighths
Subtract: 53
8
- 4 = 53
8
- 4
1
= 53
8
- 4 · 8
1 · 8
= 53
8
- 32
8
= 53 - 32
8
= 21
8
For adding, subtracting, and comparing fractions, it is suitable to adjust both fractions to a common (equal, identical) denominator. The common denominator you can calculate as the least common multiple of the both denominators - LCM(8, 1) = 8. In practice, it is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 8 × 1 = 8. In the next intermediate step the fraction result cannot be further simplified by cancelling.
In words - fifty-three eighths minus four = twenty-one eighths.
