Add 21/25 and 16/40
21/25 + 16/40 is 31/25.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 40 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 25 × 8 = 200,
21/25 = 21 × 8/25 × 8 = 168/200 - Likewise, for the 2nd fraction, since 40 × 5 = 200,
16/40 = 16 × 5/40 × 5 = 80/200 - Add the two like fractions:
168/200 + 80/200 = 168 + 80/200 = 248/200 - 248/200 simplified gives 31/25
- So, 21/25 + 16/40 = 31/25
In mixed form: 16/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+16/40 21/25+32/40 21/50+16/40 21/25+16/80 63/25+16/40 21/25+48/40 21/75+16/40 21/25+80/40