Subtract 30/28 from 72/10, Solve 7 2/10

Subtract 30/28 from 72/10

1^st number: 7 2/10, 2^nd number: 1 2/28

72/10 - 30/28 is 429/70.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 28 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 10 × 14 = 140,
72/10 = 72 × 14/10 × 14 = 1008/140
Likewise, for the 2nd fraction, since 28 × 5 = 140,
30/28 = 30 × 5/28 × 5 = 150/140
Subtract the two like fractions:
1008/140 - 150/140 = 1008 - 150/140 = 858/140
After reducing the fraction, the answer is 429/70
In mixed form: 69/70

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