Add 40/25 and 18/42
1st number: 1 15/25, 2nd number: 18/42
40/25 + 18/42 is 71/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 42 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 25 × 42 = 1050,
40/25 = 40 × 42/25 × 42 = 1680/1050 - Likewise, for the 2nd fraction, since 42 × 25 = 1050,
18/42 = 18 × 25/42 × 25 = 450/1050 - Add the two like fractions:
1680/1050 + 450/1050 = 1680 + 450/1050 = 2130/1050 - 2130/1050 simplified gives 71/35
- So, 40/25 + 18/42 = 71/35
In mixed form: 21/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/25+18/42 40/25+36/42 40/50+18/42 40/25+18/84 40/25+54/42 40/75+18/42 40/25+90/42