Subtract 9/98 from 21/15, Solve 1 6/15

Subtract 9/98 from 21/15

1^st number: 1 6/15, 2^nd number: 9/98

21/15 - 9/98 is 641/490.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 98 is 1470

Next, find the equivalent fraction of both fractional numbers with denominator 1470
For the 1st fraction, since 15 × 98 = 1470,
21/15 = 21 × 98/15 × 98 = 2058/1470
Likewise, for the 2nd fraction, since 98 × 15 = 1470,
9/98 = 9 × 15/98 × 15 = 135/1470
Subtract the two like fractions:
2058/1470 - 135/1470 = 2058 - 135/1470 = 1923/1470
After reducing the fraction, the answer is 641/490
In mixed form: 1151/490

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