Add 42/20 and 90/84
1st number: 2 2/20, 2nd number: 1 6/84
42/20 + 90/84 is 111/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
42/20 = 42 × 21/20 × 21 = 882/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
90/84 = 90 × 5/84 × 5 = 450/420 - Add the two like fractions:
882/420 + 450/420 = 882 + 450/420 = 1332/420 - 1332/420 simplified gives 111/35
- So, 42/20 + 90/84 = 111/35
In mixed form: 36/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+90/84 42/40+90/84 42/60+90/84