Subtract 90/27 from 21/50, Solve 21/50

Subtract 90/27 from 21/50

1^st number: 21/50, 2^nd number: 3 9/27

21/50 - 90/27 is -437/150.

Find the least common denominator or LCM of the two denominators:
LCM of 50 and 27 is 1350

Next, find the equivalent fraction of both fractional numbers with denominator 1350
For the 1st fraction, since 50 × 27 = 1350,
21/50 = 21 × 27/50 × 27 = 567/1350
Likewise, for the 2nd fraction, since 27 × 50 = 1350,
90/27 = 90 × 50/27 × 50 = 4500/1350
Subtract the two like fractions:
567/1350 - 4500/1350 = 567 - 4500/1350 = -3933/1350
After reducing the fraction, the answer is -437/150

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