Subtract 84/10 from 32/42, Solve 32/42

Subtract 84/10 from 32/42

1^st number: 32/42, 2^nd number: 8 4/10

32/42 - 84/10 is -802/105.

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

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 42 × 5 = 210,
32/42 = 32 × 5/42 × 5 = 160/210
Likewise, for the 2nd fraction, since 10 × 21 = 210,
84/10 = 84 × 21/10 × 21 = 1764/210
Subtract the two like fractions:
160/210 - 1764/210 = 160 - 1764/210 = -1604/210
After reducing the fraction, the answer is -802/105

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad