Solutions by everydaycalculation.com

3/21 + 8/45 is 101/315.

1. Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
2. For the 1st fraction, since 21 × 15 = 315,
3/21 = 3 × 15/21 × 15 = 45/315
3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
8/45 = 8 × 7/45 × 7 = 56/315 Download our mobile app and learn to work with fractions in your own time:
{"ft_lang_label":"__label__en","ft_lang_prob":0.72954226,"math_prob":0.99857795,"size":322,"snap":"2020-24-2020-29","text_gpt3_token_len":132,"char_repetition_ratio":0.18867925,"word_repetition_ratio":0.0,"special_character_ratio":0.49068323,"punctuation_ratio":0.064935066,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99656934,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-07-15T04:22:34Z\",\"WARC-Record-ID\":\"<urn:uuid:24d227f0-3669-48f2-8b87-664de006de77>\",\"Content-Length\":\"7674\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:4d29a93e-925b-49ee-946c-b273cdb0cb6f>\",\"WARC-Concurrent-To\":\"<urn:uuid:3ed19619-a081-42a3-825d-21c325c0e0bd>\",\"WARC-IP-Address\":\"96.126.107.130\",\"WARC-Target-URI\":\"https://answers.everydaycalculation.com/add-fractions/3-21-plus-8-45\",\"WARC-Payload-Digest\":\"sha1:BPJRRL5FZHF4CJHDXCGC7PVJ6UYERUMU\",\"WARC-Block-Digest\":\"sha1:OTJ7K66S3XXTR6XK4QG3NOYKERM62BYC\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-29/CC-MAIN-2020-29_segments_1593657155816.86_warc_CC-MAIN-20200715035109-20200715065109-00308.warc.gz\"}"}