Answer: 7 4/10 + 2/10 = 38/5 = 7 3/5 = 7.6
Answer Overall : 38/5
Step-by-step explanation: Conversion a mixed number 7 4/10 to a improper fraction: 7 4/10 = 7 4/10 = 7 · 10 + 4/10= 70 + 4/10= 74/10
To find a new numerator:
a) Multiply the whole number 7 by the denominator 10. Whole number 7 equally 7 * 10/10 = 70/10
b) Add the answer from previous step 70 to the numerator 4. New numerator is 70 + 4 = 74
c) Write a previous answer (new numerator 74) over the denominator 10.
Seven and four tenths is seventy-four tenths
Add: 74/10 + 2/10 = 74 + 2/10 = 76/10 = 2 · 38/2 · 5 = 38/5
The common denominator you can calculate as the least common multiple of both denominators - LCM(10, 10) = 10. In practice, it is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 10 × 10 = 100. In the following intermediate step, cancel by a common factor of 2 gives 38/5.
In other words - seventy-four tenths plus two tenths is thirty-eight fifths.