Subtract 3/42 from 40/10, Solve 4 0/10

Subtract 3/42 from 40/10

1^st number: 4 0/10, 2^nd number: 3/42

40/10 - 3/42 is 55/14.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 10 × 21 = 210,
40/10 = 40 × 21/10 × 21 = 840/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
3/42 = 3 × 5/42 × 5 = 15/210
Subtract the two like fractions:
840/210 - 15/210 = 840 - 15/210 = 825/210
After reducing the fraction, the answer is 55/14
In mixed form: 313/14

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