Subtract 50/7 from 45/30, Solve 1 15/30

Subtract 50/7 from 45/30

1^st number: 1 15/30, 2^nd number: 7 1/7

45/30 - 50/7 is -79/14.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
45/30 = 45 × 7/30 × 7 = 315/210
Likewise, for the 2nd fraction, since 7 × 30 = 210,
50/7 = 50 × 30/7 × 30 = 1500/210
Subtract the two like fractions:
315/210 - 1500/210 = 315 - 1500/210 = -1185/210
After reducing the fraction, the answer is -79/14

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