Subtract 21/9 from 36/7, Solve 5 1/7

Subtract 21/9 from 36/7

1^st number: 5 1/7, 2^nd number: 2 3/9

36/7 - 21/9 is 59/21.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63

Next, find the equivalent fraction of both fractional numbers with denominator 63
For the 1st fraction, since 7 × 9 = 63,
36/7 = 36 × 9/7 × 9 = 324/63
Likewise, for the 2nd fraction, since 9 × 7 = 63,
21/9 = 21 × 7/9 × 7 = 147/63
Subtract the two like fractions:
324/63 - 147/63 = 324 - 147/63 = 177/63
After reducing the fraction, the answer is 59/21
In mixed form: 217/21

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