Subtract 90/42 from 7/10, Solve 7/10

Subtract 90/42 from 7/10

1^st number: 7/10, 2^nd number: 2 6/42

7/10 - 90/42 is -101/70.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 10 × 21 = 210,
7/10 = 7 × 21/10 × 21 = 147/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
90/42 = 90 × 5/42 × 5 = 450/210
Subtract the two like fractions:
147/210 - 450/210 = 147 - 450/210 = -303/210
After reducing the fraction, the answer is -101/70

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