Subtract 4/90 from 15/7, Solve 2 1/7

Subtract 4/90 from 15/7

1^st number: 2 1/7, 2^nd number: 4/90

15/7 - 4/90 is 661/315.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 7 × 90 = 630,
15/7 = 15 × 90/7 × 90 = 1350/630
Likewise, for the 2nd fraction, since 90 × 7 = 630,
4/90 = 4 × 7/90 × 7 = 28/630
Subtract the two like fractions:
1350/630 - 28/630 = 1350 - 28/630 = 1322/630
After reducing the fraction, the answer is 661/315
In mixed form: 231/315

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